When I do an In-Depth scan, NOD32 found my PC's operating memory infected with a trojan horse, Win32/Spy.Goldun.GU . NOD32 prompted for action but the only option is to "leave", thus I am unable to clean it. The log shows " a variant of Win32/Spy.Goldun.GU trojan found in operating memory. System memory infection originated from file C:\WINDOWS\system32\uservmem.dll . " I have also tried using several other AV but didn't manage to clean this virus/trojan. Every time the file uservmem.dll is deleted, it will be back when the PC is rebooted again. And Kaspersky 6 could not even detect this trojan. I'm all at lost now. Hope NOD32 can help and really appreciate your assistance. Thanks.