Virus attack, pos win32..again!

Recently had my PC rebuilt after unsuccessfully fight with win32 virus. Yesterday the thing crashed and now won’t Boot-up, gets as far as Windows start up screen and reboots.I can’t even get as far as safe mode. Can you guys help once again?
Monday 18.10.10 Managed to get on to PC in safe mode and ran a deep scan with Avast, found infections in
Win systems 32\d\rdpcdd win32 ALURE. Also C\Docs \wf67cxnj.exe.part win32 malware.
Avast reports these infections sent to chest. I now have Microsoft security eccentials reporting a Trogen present but it cannot effect any cure and blocks the use of the pc. I was’nt aware I even had MSE on the system, is it legit?. Regarding Avast will it have been able to fully confine the Alure/Malware infections.

Try dr.web live cd http://www.freedrweb.com/livecd/?lng=en

I was'nt aware I even had MSE on the system, is it legit?.
It is legit......unless you have the Fake version, and i think you do :-[

How to remove MS Antivirus
http://www.bleepingcomputer.com/virus-removal/remove-ms-antivirus

Thanks guys. Iv’e mannaged to get back onto Windows and ran full scan with both Avast & MSE, both revealed variants of win32 trojan though different and both systems contained the threats to the chest.
It seems now though, that I cannot access internet via Firefox, any suggestions with this?

do a scan with this

Malwarebytes Anti-Malware 1.46 http://filehippo.com/download_malwarebytes_anti_malware/
it is important that you run update before you scan so you have the latest database
click on the remove selected button to quarantine anything found
if anything is found you may post the scan log here