From [previous thread here]

OK so what happens exactly? When he/she gives the 3-fingered salute, for example, does your cousin get the task manager or not? If not ... what happens?
Yes that is correct. Status of PC: XP Professional SP2 just cleaned from Vundo Trojan using MBAM automatic removal.

Task Manager was and continues to not be displayed, either by Ctrl+alt+del, or right clicking taskbar. The mouse cursor changes (so you think it is loading) but then nothing happens, not even systray icon. Even tried "run taskmgr.exe" and nothing happens.

I'm getting my cousin to install SP3, and hopefully the new DLLs/files will overwrite the corrupt ones.

Any thoughts?