System Trojans, can avast help?

Hello. I had avast anti virus but…I must of downloaded a wrong file because now I have 6 trojans.
i want to remove them but I’m not sure how. Will Avast Trojan remover do the trick?
I have trojan
[b]404fix.exe

Agent.omz.fix.exe

o4patch.exe

IEDfix.C.exe

IEDfix.exe

VACfix.exe
[/b]

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 MBAM (or SUPERantispyware or even Spyware Terminator) to scan for spywares and trojans. If any infection is detected, it is better and safer to send the infected file(s) to quarantine (Chest), rather than simply deleting them.
  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. Clean your Hosts file (replacing it) with HostsMan tool.
  7. Disable System Restore and then reenable it again.
  8. Immunize your system with SpywareBlaster.
  9. Check if you have insecure applications with Secunia Software Inspector.