Dont try to run it. Look in My Computer at the C drive or in Explorer and see the size.
Partitioning is the act of splitting one hard drive - say 80GB, into 2 or more smaller drives. For instance, I have an 80GB hdd but I have like 5 partitions total. 1 strictly for windows and programs, the C: drive which is 15GB, 1 for my downloaded media @ 20GB, 1 for my video scratch only (the drive I tell all temp files for Vegas and my temp renders to go to ) @ 20GB, etc. The reason for this, other than cleanliness and organization, is because all the time windows is doing things in the background, even when you are capturing or rendering. By having windows by itself on the C drive it can work in the background while I capture to another drive, or render to another drive. This prevents dropped frames in capture and slowdowns/malfunctions while rendering. It also speeds up previews in Vegas or other NLE's.