How about Baidu antivirus and Baidu guardian? Is it useful?

Baidu antivirus and Baidu guardian, focusing on minimalist style, provide system optimization and virus killing services for users' computers. Is a very practical system optimization software, with fine design, light weight, complete core functions but not bloated.

Baidu Guardian: It is a simple and reliable system tool software newly produced by Baidu Company. It integrates the functions of computer acceleration, system cleaning, Trojan horse killing and software management, and strives to provide users with a light, fast, intelligent and pure product experience. Baidu Guardian solemnly promises: forever free, not harassing users, not intimidating users, not peeking at users' privacy!

Baidu antivirus: It is a brand-new antivirus software jointly produced by Baidu and Kaspersky, a computer antivirus expert. It combines Baidu's powerful cloud computing, massive data learning ability and Kaspersky anti-virus engine professional ability to change the image of anti-virus software card machine and try its best to provide users with a lightweight product experience without card machine. Baidu antivirus solemnly promises: forever free, not harassing users, not intimidating users, not peeking at users' privacy!