My WinXP PC does the same thing. I can go thru several discs b4 Windows finally accepts one. PC World said to try removing the floppy disk drive controller in Device manager, re-booting and see if that works. It didn't 4 me. I bought a brand new floppy drive, but that didn't resolve it either. You could check Microsoft Knowledgebase. I'll have a little look around if I find the time.