I installed some iRiver software once that corrupted my Windows Media Player and when I tried uninstalling and reinstalling the player, it told me my Windows was invalid. Funny, I purchased my computer from Circuit City and was given a Windows CD with an activation key and everything, so I'm pretty sure my copy is good. I'm sure reformatting the computer and doing a fresh install of Windows would fix the problem, but, meh....
It isn't the size of the disk that counts, but how you use it.
4K cinema at 60mbps, coming soon to a kiosk near you.