What is the reason why the computer is slow?

1, set virtual memory.

There is a very large data exchange file in the hard disk, which is reserved by the system for temporary storage in virtual memory. Many applications are often used, so the system needs to access a large amount of data to main memory frequently, so the speed of accessing this file constitutes a very important factor affecting the speed of the computer! Generally, the default of Windows is that the virtual memory is managed by the system itself, and the size of the swap file will be automatically adjusted according to the needs of different programs, but such enlargement and reduction will bring extra burden to the system and slow down the operation of the system! In view of this, it is best for users to customize the minimum and maximum values of virtual memory to avoid frequent size changes. To set up virtual memory, right-click My Computer and select Properties. In the advanced options of the Efficiency dialog box, set the virtual memory.

3. Check the application software or drivers.

Some programs will slow down the computer system when they are started. If this is the reason, you can start with "safe mode". Because this is the initial startup, Safe Mode is slower than normal operation. However, if you start in "safe mode", you find that the computer starts faster than normal, which may be the reason why a program causes the system to start slowly.

4. Too many desktop icons will bring trouble.

Too many desktop icons will also slow down the system startup. Every time Windows starts and displays the desktop, it needs to find the icons of desktop shortcuts one by one and load them. The more icons, the more time it takes. At the same time, some anti-virus software provides system startup scanning function, which will consume a lot of time. In fact, if you have turned on the real-time monitoring function of antivirus software, the scanning system will be a bit redundant when starting, so it is better to disable this function! I suggest that you put the uncommon desktop icons in a special folder or simply delete them!

5. Due to ADSL, the system starts slowly.

By default, Windows XP will self-check network devices such as network cards at startup. If the IP address of the network card is found to be incorrectly configured, it will be set, which may be the real reason for the slow system startup. At this time, we can open the "Local Area Connection" property menu, and double-click "Internet Protocol" in the "General" item to open the "TCP/IP Properties" menu. Configure the IP address of the network card to a value that has not been used by the public network (the default gateway is 192. 168. 1), such as192.1. X, where x is a value between 2 and 255.

6. The influence of font on speed

Although Microsoft claims that Windows operating system can install 1000 ~ 1500 fonts, in fact, when you install more than 500 fonts, there will be problems, such as: fonts disappear from the font list of application programs, and the startup speed of Windows drops sharply. It is suggested to delete unused or commonly used fonts. In order to avoid accidents after deletion, you can make necessary backups first.

7. Delete the random startup program

What is a random boot program? A random boot program is a program that is loaded at boot time. Random startup program will not only slow down the startup speed, but also consume computer resources and memory faster. Generally speaking, if you want to delete random startup programs, you can delete them in the startup list, but if you want to be more detailed, such as QQ, popkiller and other software, you can't delete them in the startup list. You should go to accessory applications, system tools, and then. Press Tools in the toolbar above, and then press System Configuration Editor. After entering, in the "startup" dialog box, the random startup program loaded when starting the computer will be listed in detail! XP system, or you can enter Msconfig in "Run" and call "System Configuration Utility" to terminate the system random startup program. 2000 system needs to copy msconfig program from XP.

8. Cancel the background and close activedesktop.

I don't know if you have noticed that the beautiful background we have been putting on the desktop is actually a waste of computer resources! Not only that, it will also slow down the computer when executing applications! I wanted to beautify the desktop, but it slowed down the computer, so we didn't need the background. To do this, right-click the desktop, click Content, and then select None in the Background dialog box. In the Appearance dialog box, the preset turquoise on the desktop turns black ... As for closing activedesktop, you will be told to close the web screen from the desktop. So don't turn it on if the system configuration is not high.

10, making Windows slimmer.

Compared with DOS system, Windows is too big, and with your daily operation, install new software, load runtime, add new games and so on. It becomes bigger, and more importantly, it is not only its directory, but also its registry and runtime. Because even if a program is deleted, the DLL file it uses will still exist. Therefore, with the long-term use, the DLL files that need to be loaded when Windows starts and exits are getting bigger and bigger, and the running speed of the natural system is getting slower and slower. At this time, you need to use some programs that completely delete dll, which can make Windows slim again. It is recommended that the best players reinstall Windows once every two months, which is very effective.

1 1, change the system startup time.

Although you already know how to add and delete some random startup programs, do you know what the computer is doing from booting to entering Windows? Or, what program is being executed? These programs must be fully loaded before entering Windows. Have you ever thought that if you can delete some unnecessary startup programs, the startup speed will be accelerated? The answer is yes! If you want to modify, you can press "Start", select "Execute", and then enter win.ini. After opening, you can delete the contents of the following paragraphs, even the title! They include: [Compatibility], [Compatibility 32], [ime Compatibility], [Compatibility 95], [Module Compatibility] and [Embedding].

Second, hardware.

1, the Windows system automatically turns off the hard disk DMA mode.

Everyone should know the DMA mode of hard disk. PATA modes of hard disk are DMA33, DMA66, DMA 100, DMA 133, and the latest SATA- 150 has come out! Generally speaking, most people still use the hard disk in PATA mode, and the transmission speed of the hard disk in DMA mode is 2~8 times faster than that in PIO mode. DMA mode plays an important role in system performance. But you know what? Windows 2000, XP and 2003 systems sometimes turn off the DMA mode of the hard disk and automatically switch to PIO mode! This leads to the sudden decline of hard disk performance when using the above system, and the most obvious phenomenon is that the startup speed of the system is obviously slow. Generally speaking, when a normal Windows XP system starts, the slider moving from left to right can start the system up to 2 ~ 4 times, but when this problem occurs, it may go 5 ~ 8 times or even more! Moreover, the hard disk operation is obviously slow when the system is running. When running some large-scale software, the CPU utilization often reaches 100%, which leads to a pause, while when playing some large-scale 3D games, the picture obviously stops. When the above problems occur, you'd better see if the DMA mode of your hard disk is automatically turned off by the Windows system. Check whether your system is turned on in DMA mode:

A. Double-click management tools, and then double-click computer management;

B. Click System Tools, and then click Device Manager.

C. expand the node "IDE ATA/ATAPI controller";

D. double-click your "main IDE controller";

2. Whether the 2.CPU and fan work normally and whether there is enough refrigeration.

When the speed of the CPU fan slows down, the temperature of the CPU itself will rise. In order to protect the security of CPU, CPU will automatically reduce the running frequency, which will slow down the running speed of the computer. There are two ways to detect the temperature of the CPU. You can use the "finger test" method to test whether the temperature of the processor is hot, but it should be noted that this method must first unplug the power plug and then connect a ground wire to prevent static electricity from penetrating the CPU or even damaging the CPU. Another scientific method is to use a multimeter with a temperature sensor to detect the temperature of the processor.

Because the types and models of processors are different, the reasonable temperature is also different. But generally speaking, the temperature should be lower than 1 10 degrees. If the processor test is found to be higher than this temperature, check whether the fan in the chassis works normally.

3, the impact of USB and scanner

Since Windows tests every drive (including the optical drive) at startup, if a CD is placed in the optical drive, it will also extend the startup time of the computer. So if the computer is equipped with scanners and other devices, or the USB hard disk is connected when it is started, then try to disconnect them first to see if the startup speed has changed. Generally speaking, due to the slow speed of USB interface, the corresponding devices will obviously affect the startup speed of the computer, so you should try to connect USB devices after startup. If there is no USB device, it is recommended to turn off the USB function directly in BIOS settings.

4. Do you use disk compression?

Because "disk compression" may cause a sharp decline in computer performance, resulting in a slower system speed. So at this time, you should check whether "disk compression" is used. The specific operation is to click the right mouse button on "My Computer" and select the "Properties" option from the pop-up menu to view the properties of the drive.

5, the influence of the network card

As long as it is not set properly, the network card will obviously affect the startup speed of the system. If your computer is connected to the local area network, after installing the network card driver, the system will automatically get the IP address through DHCP by default, but most companies' local area networks do not have DHCP servers. Therefore, if the user is set to "automatically obtain the IP address", the system will constantly search for DHCP servers in the network at startup until it obtains the IP address or times out, which will naturally affect the startup time. Therefore, LAN users had better specify a fixed IP address for their computers.

6. Folders and printers * * *

Computers with Windows XP Professional Edition will also start very slowly. Sometimes, the system seems to give people the feeling of collapse. After logging into the system, the desktop does not appear, and the computer seems to stop responding. It will take 1 minute before it can be used normally. This is because after using the Bootvis.exe program, the Mrxsmb.dll file adds 67 seconds to the computer startup!

To solve this problem, just stop * * * sharing folders and printers: select Start → Settings → Network and Dial-up Connections, right-click Local Area Connection, select Properties, uncheck the check box before * * * sharing files and printers on Microsoft network in the open window, and restart the computer.

7. Improper configuration of system accessories

Some users often ignore some trivial matters when assembling machines, which leads to improper matching of computer accessories and speed bottlenecks. For example, some friends choose high-end CPU, but sound cards and the like all buy ordinary cheap goods. In fact, this is often not worth the loss. Because in this way, when the computer is running games and playing DVD, the sound card occupies high CPU resources, the data transmission speed is slow, or there is no hardware decoding at all, and software decoding is needed, which often leads to the pause of sound and even the intermittent operation of programs. For example, some friends have upgraded their machines. Some parts of the old machine, such as memory chips, are unwilling to be abandoned and installed on the new machine. However, due to the speed limitation of the old memory, new machines often have to slow down to adapt to it, thus reducing the performance of the whole machine and greatly affecting the overall running speed.

9. Disconnect unused network drives.

In order to eliminate or reduce the number of network connections that Windows must re-establish, it is suggested to disconnect some unnecessary network drives, that is, go to My Computer, right-click the mapped network drive and select Disconnect.

10, out of memory.

One advantage of Windows operating system is multi-line and multi-task. The system can use CPU for time-sharing operation, so that you can do many things at the same time. But there are advantages and disadvantages, and multitasking will also put forward higher requirements for your machine. Friends all know that even the most commonly used WORD software needs about 16MB of memory, but when running large-scale software such as 3D MAX, 64MB of memory is not enough. So at this time, the system will automatically use the hard disk space in virtual main memory to run programs and store exchange files and various temporary files. Because hard disk is a mechanical structure and memory is an electronic structure, the speed difference between them is several orders of magnitude, so virtualizing main memory with hard disk will greatly slow down the running speed of the program.

1 1, hard disk space is insufficient.

One disadvantage of using Windows system platform is unclear file management. Sometimes you don't know whether this file is useful to the system at all, so there are more and more files in the Windows directory, and the capacity is getting bigger and bigger. In addition, the current software likes more and more, and some temporary files and swap files generated by the system will make the available space of the hard disk smaller. When the available space of hard disk is less than a certain extent, it will cause the system to lack the available space for exchange files and temporary files, which will reduce the operating efficiency of the system. More importantly, because we frequently store and delete all kinds of software on the hard disk, the available space of the hard disk becomes fragmented, so the system often does not store files in a continuous order, which will lead to the frequent movement of the head when the system stores and reads files, greatly reducing the running speed of the system.

12, too many hard disk partitions is not right.

If your Windows 2000 is not upgraded to SP3 or SP4, and too many partitions are defined, it will take a long time to start, or even hang up. Therefore, it is recommended to upgrade the latest SP4, and at the same time, it is best not to divide the hard disk into too many areas. Because Windows must load each partition at startup, the total time to complete this operation will increase as the number of partitions increases.

Third, virus articles.

If your computer is infected with a virus, the running speed of the system will be greatly slowed down. After the virus invaded, it first occupied the stronghold of memory, and then began to copy itself endlessly in the memory based on it. As it becomes more and more huge, it quickly takes up a lot of memory in the system, which leads to the slow running of normal programs and even the inability to start because of insufficient main memory. At the same time, the virus program will force the CPU to execute useless junk programs, so that the system is always in a busy state, affecting the operation of normal programs and causing the computer to slow down. Here are some viruses that can slow down the system.

1, the bride virus that slows down the system.

Virus type: hacker program

Attack time: random

Communication mode: network

Infected object: network

Alert level: ★★★★★

Virus introduction:

This virus can run normally in Windows 2000, Windows XP and other operating systems. The runtime will automatically connect to the www.hotmail.com website. If you can't connect to this website, the virus will sleep for a few minutes, then modify the registry and add itself to the registry startup item. The virus will release four virus bodies and a vulnerable virus mail and send it out through the mail system. The virus will also release FUNLOVE virus to infect LAN computers. Finally, the virus will kill dozens of known anti-virus software and make these anti-virus software invalid.

Viral characteristics

If users find these features in their computers, they are likely to be infected with this virus.

After the virus runs, it will automatically connect to the www.hotmail.com website.

The virus will release Bride.exe, Msconfig.exe and Regedit.exe into the system directory; Release: Help.eml, Explorer.exe file to desktop.

The virus will add the path of Regedit.exe virus to the HKEY _ local _ machine software Microsoft Windows CurrentVersionRun key in the registry.

When the virus runs, it will release a FUNLOVE virus and execute it. The FUNLOVE virus will multiply in the computer, causing the system to slow down and the network to be blocked.

The virus will look for the email address in the computer, and then send a large number of emails with the title:; (For example, if the user's computer name is Dong Zhang, the title of the virus email is Dong Zhang).

The virus will also kill dozens of famous foreign antivirus software.

If users find all or part of the above phenomena in their computers, they are likely to be infected with Bride(Worm.bride) virus. Please use their antivirus software to clean up immediately.

2. Avalon virus that slows down the system.

Virus type: worm virus

Attack time: random

Transmission mode: network/file

Infected object: network

Alert level: ★★★★★

Virus introduction:

This virus can run normally in Windows 9X, Windows NT, Windows 2000, Windows XP and other operating systems. When the virus runs, it will restore itself to TEMP, SYSTEM and RECYCLED directories, and randomly generate file names. After the virus runs, it will consume a lot of system resources, obviously slow down the system, kill some running antivirus software, and establish four threads to spread wildly in the LAN.

Viral characteristics

If users find these features in their computers, they are most likely infected with this virus:

When the virus runs, it will restore itself to TEMP, SYSTEM and RECYCLED directories with random file names.

When the virus runs, it will obviously slow down the system.

The virus will kill some running antivirus software.

The virus will modify the self-startup entry in the registry to start itself.

The virus will set four threads to spread in the local area network.

If users find all or part of the above phenomena in their computers, they are likely to be infected with "worms". Avron "virus. Because this virus has no fixed virus file name, it is better to clean it with anti-virus software.

3, malignant worm shock wave

Virus name: worm. Sasser

Chinese name: shock wave

Virus alias: W32/Sasser.worm [Mcafee]

Virus type: worm

Affected systems: WinNT/Win2000/WinXP/Win2003.

Symptoms of viral infection:

Inexplicably crashes or restarts the computer;

The system speed is extremely slow, and the cpu takes up100%;

The network slows down;

The most important thing is that there is a process called "avserve.exe" running in the Task Manager!

Failure mode:

Lsass vulnerability on WINDOWS platform is widely spread, opening hundreds of threads to attack other online systems and blocking the network. Virus attacks will make the system restart constantly.

Unlike most recent worms, the virus does not spread by mail, but by ordering vulnerable machines.

Download specific files and run them to achieve the purpose of infection.

File name: avserve.exe.

Solution:

Please upgrade your operating system to avoid attacks.

Please open the personal firewall shielding ports: 445, 5554 and 9996 to prevent the program named avserve.exe from accessing the network.

Manual solution:

First of all, if the system is WinMe/WinXP, please turn off the system restore function first;

Step 1, use the process program manager to end the virus process.

Right-click the taskbar to pop up the menu and select Task Manager to open the Windows Task Manager window. In the task manager, click the Process tab, find the virus process avserve.exe in the instance bar, click the End Process button, click Yes to end the virus process, and then close the Windows Task Manager;

The second step is to find and delete the virus program.

Go to the system installation directory (Winnt or windows) through my computer or resource manager, find the file "AVSER ve.exe" and delete it; Then enter the system directory (Winntsystem32 or windowssystem32), find the file "*_up.exe" and delete them;

The third step is to delete the entries added by viruses in the registry.

Open the registry editor: click start-> run, enter REGEDIT, and press enter;

In the left panel, double-click (search in arrow order, and then double-click after finding it):

HKEY _ Current _ User Software Microsoft WindowsCurrentVersionRun

In the right panel, locate and delete the following item: "avserve.exe" =% systemroot% avserve.exe.

Close the Registry Editor.

Part II System Acceleration

First of all, Windows 98

1. Don't load too many random startup programs.

Don't load too many unnecessary random startup programs when starting. Select Start → Programs → Accessories → System Tools → System Information → System Information Dialog Box, and then select Tools → System Configuration Utility → Start. You just need to put the hook in front of internat.exe, and everything else is unnecessary. Just select and confirm the restart.

2. Convert the system file format

Turn the hard disk from FAT 16 to FAT32.

3. Don't use the background easily.

Don't use ActiveDesktop, or the system will slow down (right-click the screen → find display properties →Web tab → uncheck all options about Active Desktop and Channels).

4. Set up virtual memory

Set the virtual memory to 3 times the machine memory. For example, if there is 32M memory, set the virtual memory to 96M, and the maximum and minimum values are the same (this setting can be set by "Control Panel → System → Performance → Virtual Memory").

5. Some optimized settings

A go to the control panel and select "System → Performance → File System". Change the "main purpose of computer" on the hard disk label to network server, and adjust the "read-ahead optimization" to full speed.

B. Cancel "Search for a new floppy disk drive every time you start" in the "Floppy Disk" tab.

C. Adjust the "additional cache" in the CD to the maximum, and select the CD with quadruple speed or faster access mode.

6. Organize the system regularly.

Use the following tools regularly: disk scanning, disk cleaning, defragmentation, system file checker (ASD), Dr? Watson, etc.

Second, Windows 2000.

1, upgrading the file system

A. If the operating system you are using is dual boot of win 9x and win 2000, it is recommended that the file system format be FAT32, which can save hard disk space and share resources between Win9X and win 2000.

Reminder: To realize this dual boot, it is best to install 9x in the C area under the pure DOS environment, and then install 2000 in another area of 9x or install it with win 2000 boot disk under the DOS environment, and this area must have at least 800M space.

B, if only win 2000 is used, it is suggested to convert the file system format into NTFS format, which can save hard disk space, and has higher stability and running speed, and this file system format has good error correction; But in this way, DOS and win 9x systems cannot run in this file system format, which is why it is best to use FAT32 format to ensure that resources can be enjoyed. And some applications can't run under this file system format, most of them are games under DOS.

Reminder: The way to upgrade the file system in win 2000 to NTFS format is: click Start-Programs-Accessories to select the command prompt, and then enter "convert drive_letter:/fs:ntfs" in the prompt window that opens, where "drive" is the partition symbol of the hard disk you want to upgrade, such as area C; It should also be noted that upgrading the file system will not destroy the files in the upgraded hard disk partition, and there is no need for backup.

Run Add-Remove Programs again, and you will see an additional option "Add/Remove Windows Components";

B, open "Folder Options" and select "Show all files and folders" in the "View" tab. At this point, Autoexec.bat and Config.sys will appear in the root directory of the partition where you installed win 2000. In fact, there is nothing in these two files, so you can safely delete them.

C. Right-click "My Computer", select "Management" and click the "Service" option under "Services and Applications", and you will see various programs loaded on win 2000, many of which are related to LAN settings or other functions. You can completely disable programs you don't use.

For example: Alertr, if it is not in the LAN, it can be set to be disabled; There is also a fax service, which is set to be disabled if you don't send a fax; Spooler, no printer available. Uninterruptible power supply without UPS is also set to be disabled. You can set these loaders according to your actual situation.

Each loader is followed by instructions and running status; Select the program you want to disable, right-click it, select Properties, click Stop, and set the startup type to Manual or Disabled.

D, closing the debugger, Dr. Watson; ;

Run drwtsn32 to delete everything except "Dump all thread contexts". Otherwise, once a program goes wrong, the hard disk will ring for a long time and take up a lot of space. If you have encountered this situation before, please find the user.dmp file to delete, which may save tens of megabytes of space. This is the scene of the wrong program, which is useless to us. In addition, the memory.dmp that appears when the screen is blue can also be deleted. Can be turned off in my computer/properties.