false neagatives //real or not ?trojans malware ot virus ..how do tell

[kohchang]

heh yes i am a duh when it come to this .yesterday i had problems with msn live so i shut down avast and spyware terminator in  a attempt to fix it ,,,, then had tried  to  reinstall msn live many times .
unsuccessfulu at curing my issue with msn live finally i took my pc to local guy her (i live thailand )and today i ran a avast scan and holy cow its finding heaps of virus ,trojans and other ..before i rarely found anyone ,,,almost nil since i have had avast free


one of which of these infections i couldnt move to vault.
this one was in documents settngs users and was called
Jump Poll Poke Mp3\Blue Browse.exe
so in annoyance after many attempts i deleted it
was it a true virus  .. trojan
was it for real >>> a??


many of these new files in my vault have the virus ...win:32 swizor N tro ..

so i assume these reallt are  virus?
 
while others have no virus name shown yet are isolated as virus affected ..

how do i know what  is real or not
do i leave them in my vault or dump them 
help please 
thanks
steve

[Lisandro]

If a virus is coming and coming again, I suggest:

1. Clean your temporary files.
2. Schedule a boot time scanning with avast with archive scanning turned on. If avast does not detect it, you can try DrWeb CureIT! instead.
3. 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.
4. Test your machine with anti-rootkit applications. I suggest avast! antirootkit or Trend Micro RootkitBuster.
5. Make a HijackThis log to post here or this analysis site. Or even submit the RunScanner log to to on-line analysis.
6. Disable System Restore and then reenable it again.
7. Immunize your system with SpywareBlaster or Windows Advanced Care.
8. Check if you have insecure applications with Secunia Software Inspector.