At the risk of turning this into a "how to fix my PC" thread, I am going to boot and nuke my PC box and reinstall windows when I have nabbed all the files off of it and put them on my Mac. There is about 100Gb of files I would like to keep on this machine, so I will be unable to try a reinstall of Windows before I can find out if it works or not. Repeat: need to get data off before I try this. I know this is a software thing but i am unable to fix it via Windows XP repair or driver reinstalls (yes I have covered this already, especially as it is easy to replace the default BIOS on Lanparty boards) so a complete format and reinstall will be the only option to fix this.
PS: It's a Lanparty NF2 board - yes, my old system was based on an Althon 2500+
PPS: This all happened when my boot drive died and came back to life following a mundane hardware upgrade. I wanted to install a new 160GB drive and couldn't (drive was DOA). But when i put everything back together,
the boot drive was corrupted (for no reason whatsoever). After struggling with it, it suddenly booted up ok, but thereafter I had terrible trouble with new USB devices not being recognised (actually, it would fail to install drivers, even for devices using default drivers, claiming the device was locked and access was denied).
One I Boot n Nuke and reinstall windows, I will be happier with it, but now that I have my Mac, I might just end up adding Linux and using it as a file server of sorts.