It seems that the system is infected with Vundo trojan.
Symantec has removal tool which you can try.
Download it from http://securityresponse.symantec.com/avcenter/venc/data/trojan.vundo.removal.tool.html
then download VirtuMonde removal tool in http://securityresponse.symantec.com/avcenter/FxVMonde.exe
Or do the following:
Download HijackThis from:
It is important that you run HijackThis.exe in its own folder so the backup files that HijackThis creates will not be accidentally deleted.
Open 'My Computer', then double-click to open C:\ (or the drive letter that your Windows is installed on)
In the menu bar, click File-->New-->Folder.
That will create a folder named New Folder, which you can rename to ''HJT'' or ''HijackThis''. Now you have C:\HJT\ or C:\HijackThis\ folder. Put your HijackThis.exe there, and double click to run it.
Click 'Scan' button. Click 'Save log' button. Save the 'hijackthis.log' in your desktop. Copy and paste the content of 'hijackthis.log' and post the log file in any forums that offers HijackThis analysis.
You can find the forums in http://asap.maddoktor2.com/
Please DO NOT fix anything by yourself using HijackThis if you not familiar with it.
Let the HijackThis analysts to review your log and wait for further instructions.
Running Windows XP home, SP2, Norton Antivirus 2005, SpybotS&D, teatimer running
Norton detected Download.Trojan, it is located in C:\WINDOWS\system32\sstqq.dll.
I disabled system restore, started in safe mode, and scanned with Norton. It couldn't delete the file. I tried, still in safe mode (even restarting a second time in safe) to delete it manually, and it said that it couldn't delete because another program is using the file. But I was in safe mode and didn't know what program could be using it. I tried moveonb.msi that I found in another cnet forum entry, and that didn't work. I have spybot teatimer so I went into the system startup and found 2 entries for system.ini that have the name of sstqq.dll, but I uncheck them so they won't start, and as soon as I exit the teatimer and re-enter, they're back! I can't disable them on startup, can't remove them with the GiPo MoveOnBoot Utility. What else can I try?