Windows Defender crashes

[Guest]

windows defender crashes while trying to clean Trojan Downloader:Win32 /zlob
Them my whole system crashes I have to shut dwn from tower and cold boot

 

[Rock]

windows defender crashes while trying to clean Trojan Downloader:Win32
/zlob
Them my whole system crashes I have to shut dwn from tower and cold boot

http://www.google.com/search?hl=en&q=vista+Win32+zlob