Windows 0x0000007B error

[Muso]

Hey guys

Was just browing on the net Saturday and all of a sudden my pc bombed. Upon reboot I got a BSOD and it mentioned something about "IRQ LESS THAN OR EQUAL" so Installed XP onto another drive and ran a virus scan, chkdsk etc on it.
Anyway removed lots of virsuses with Avast using a bootup scan, now the BSOD said "STOP 0x000007B" on C:
What is strange is that I have no option to use windows repair from bootup. Ive definately used windows repair before, also recovery console is missing.
I booted into D and installed windows recovery console and tried using various commands such a fixmbr and all those others to fix the bootup. Anyway its been ages now and I'm at a loss what to do next. I think that if I could somehow get windows repair on the installation on C: It would fix it but don't know of any way to access it.

Has anyone encountered a similar problem, what could cause the boot from Cd not to see previousley installed versions of windows and not to offer a repair or console?

Many thanks

 

[Muso]

Thanks for all the replies, I always try to fix things like this before just re-installing.

Admiral Huddy, I doubt it is the RAM as the symptoms of windows not being to do a repair where it previousley had, also new RAM recently installed and the computer is running fine on another partition.

Dappy, I'll give that a go but not seen any options for it in Bios though, why would it have gone wrong all of a sudden though?

Deathwish, I've done a fixmbr and pretty much everything possible in the recovery console, its shame I can't run repair from console.