When you're attempting to repair Windows, it should first ask you to install or repair (after it loads all of the setup files). Do you see the option for repair 'R' ?
If you end up retrying this and getting into the repair console the system will list the available operating systems to repair such as:
In this case you would enter "1" then hit enter, and for the administrator password you would just press enter again, that is unless you've changed the administrator password.
At this point you should be at a command prompt "C:\"
I would suggest running a chkdsk first by typing CHKDSK /R and then letting this run (it could take 2-3 hours)
One quick other thing you could try is if you have multiple memory modules installed in your PC, take them all out and put them back in 1 at a time (alone). If the computer works with one, or doesn't even boot with one then you can narrow down your issue to most-likely memory related. I only recommend this because IRQ BSOD's often have to deal with memory, not drivers as they state.
Edited by fueL, 27 August 2010 - 11:51 PM.