There are many Trojans this year, and an anti-virus software may not kill some viruses. If you use 360 security guards (download), windows cleaning assistant and malware cleaning assistant (these two go to Dortmund, there is absolutely no virus) to jointly kill and kill, it will generally be solved. If not, download and install 360 security guards first (it can run better now, and directly kill malware and Trojans. If it can't run, turn off the automatic running of all disks in the computer group policy (if you can't turn off the tools, many antivirus tools will have this function), restart the computer and press F8 to enter the safe mode, and use 360 security guards to kill malware and Trojans. If 360 can't run, run the "Repair Tool" in the installation directory of 360, click "Safe Start 360", and then use the antivirus tool to completely kill the virus after killing. If the above methods cannot be handled, reinstall the system and disconnect the network. First, turn off the automatic operation of all disks in the computer group policy. Second, put in the system installation disk and restart the computer. Third, set the CD-ROM drive to start for the first time (press and hold DEL to enter the BIOS for setting). 4. Install the system according to the CD operation prompts. Five, enter the system, don't click on any other hard disk except the system disk, install anti-virus software, connect to the network (you can use 360 security guards to kill first), only update the anti-virus software, and carry out overall anti-virus.