pc boot failure again!

[JSIMMO]

My PC is failing to bootup again, it started this morning when it actually came on, but was running really, really slow. I've had the CMOS battery out like i have in the past but nothing worked, i changed the boot order a million times and tried last known good configuration. tried putting the windows disc in but it just gives me the background and a mouse pointer, ive had it like this for two hours now waiting for it to load.

Well the disc is spinning up again now... lets see eh haha, anyone got any ideas on wdf is going on??

[JSIMMO]

trying to do repair windows now. it appears that the drivers for my disc drive have dissapeared, and i dont know how to get them back. :-/

[JSIMMO]

Hard disc, not disc drive.

[JSIMMO]

Oooh tink ive got it now, its repairing dissk errors atm, gunna take over an hour an to complete aha