Following on from my "preferring XP" declaration last week, I've just found out why my C: drive has over 49GB used of 50GB.
Apparently its to do with cover art downloaded with iTunes.
Media Player has a nasty little Network Sharing service, which stores these cover art files (jpgs) and fills up your drive with them. 150,000 (27GB) of the bloody things on my system!
Yeah Windows 7 is blummin great, cheers!

