Trojan Downloader.Small.6.B

I have this virus and AVG seems unable to remove it. It tells me the infected file is in C:\Documents and Settings\Mike\Application Data\UPDATE.EXE but when I click "move to virus vault" I get the message saying it cannot be deleted. I have run Spybot S&D and Hijackthis, can you help me fix it? The log is attached.

 

Hi mikesmith,

This looks like a combo of files keeping each other alive:
O4 - HKCU\..\Run: [System Update] c:\winnt\system\update.exe
O4 - HKCU\..\Run: [System Update2] c:\docume~1\mike\applic~1\update.exe
O4 - HKCU\..\Run: [System Update4] c:\docume~1\mike\applic~1\system.exe

Check the items listed above in HijackThis, close all windows except HijackThis and click Fix checked.

Then reboot into safe mode and delete:
c:\winnt\system\update.exe
c:\documents and settings\mike\application data\update.exe
c:\documents and settings\mike\application data\system.exe

Get your Windows and IE updated as soon as possible.

Regards,

Pieter