Please help: Cannot boot into Windows XP

[ekalbels9]

I have a PC and its my work machine (music production) and yeah i know its bad but i have the internet on it.

I had an issue with a trojan/virus a few months ago and finally resolved it but it looks like its back a bit.

The problem is i get a 'blue screen of death' everytime i try to boot into Windows XP in both normal and safe mode. My restore points are all gone and i've tried Repairing the OS and that had no effect. Still getting the BSOD.