I've encountered this one, too. In fact, you are infected with a Trojan virus. He disguised as auclt.exe of Tencent. Originally, this program was used to upgrade QQ, but the Trojan disguised as it. In this case, the antivirus software will think that it is not a virus when scanning, and of course it can't be scanned. In fact, the disguised Trojan program is in C: \ users \ chenshuai \ appdata \ roaming \ Tencent \ QQ \ autemp \ mm% 2i] {W4 [d% 85 ~ $ 6G3 {4 (h \ 111), the disguised program is in the 111 file, and you only need to crush it with 36. Note that the following options should be checked to prevent file regeneration (for Trojans and viruses) when shredding. Explain that chenshuai in the path is my user name in the computer, and show the hidden folder when looking for Trojans. I hope I can solve your problem! This is my own exploration, and it may not be very professional!