Too true you'll have problems. Sadly I can understand this situation - check for what's using the space - the rubbish bin sometimes hold files even after the bin has been emtied - usual suspects are also IIS logs and tmp files, not foretting overblown page file and vsp files left by backup routines, make sure you show hifdden and o/s files when you examine the drive. Youi need to fix this now before your server dies.