Heya my avast has picked up 3 viruses, just wondering if anyone is able to tell me what they do…
Win32:Delf-HOX [trj]
Win32:VB-GYP [trj]
Win32:Agent-QYY [trj]
Hi…
The “trj” suggests these are trojans. While I don’t know the specific details or intended functions of each of them, a short, general description can be found here…
http://en.wikipedia.org/wiki/Trojan_horse_(computing)
Hope this helps. 
Best Regards…
Besides knowing what they can do, I suggest:
- Disable System Restore and reenable it after step 3.
- Clean your temporary files.
- Schedule a boot time scanning with avast with archive scanning turned on.
- Use SUPERantispyware, MBAM or Spyware Terminator to scan for spywares and trojans. If any infection is detected, better and safer is send the file to Quarantine than to simple delete than.
- Test your machine with anti-rootkit applications. I suggest avast! antirootkit or Trend Micro RootkitBuster.
- Make a HijackThis log to post here or, better, submit the RunScanner log to to on-line analysis.
- Immunize your system with SpywareBlaster or Windows Advanced Care.
- Check if you have insecure applications with Secunia Software Inspector.