Last week 5 (October 22), the machine only changed a network environment, and he kept restarting, and there was a prompt from that had seen, as shown in the figure: No virus, the diagnosis, discovery and network during the diagnosis Related, it is better to break off the network. I asked online, and the answer may be shocking wave, but downloaded a special killing tool for shock waves and vibration waves, and anti-virus. Guess is caused by other poisoning machine attacks, downloaded a safe patch http://download/1/0/4/104AB4FE-660D-4D6D-B50A-EA4491DD7FB2/Windows 2000-kb835732- x86-chs .Exe, it is better.