Win8. 1 system, when this happens, all application software cannot be opened. Ask experts for help.

If all application software can't be opened under Win8. 1 system, you can try the following solutions:

Restart the computer: First try to simply restart the computer, which may solve some common problems.

Check for system updates: Make sure that all system updates have been installed on your Win8. 1 system. Open the Control Panel, select Windows Update, and then click the Check for Updates button to install all available updates.

Repair system files: Some system files may be damaged, so that all applications cannot be opened. You can use the System File Checker (SFC) to scan and repair damaged system files. Open a command prompt (administrator privilege), type "sfc /scannow", and then press Enter.

Reset application settings: You can try resetting application settings. On the Start screen, right-click the application that cannot be opened, and then select Advanced Options. Click the Reset button, and then confirm that you want to reset the application settings.

Perform virus scanning: If the computer is attacked by a virus, it may also cause the application to fail to open. You can use anti-virus software to conduct a comprehensive scan and remove all viruses.

Create a new user account: Finally, you can try to create a new user account to see if the application can be opened in the new account. If so, your old user account may have been affected by some problems.