I'm thinking of upgrading to Windows 8, but wanted to know which is best? I was thinking of going to ultimate but is it worth it? But my main question is why am I continually losing hard drive space. I recently updated to Vista from XP and that's when it really started. (That I noticed anyways). Yesterday it was at 227 GB of free space but now it's at 215 GB. Almost a week ago I had like 240 GB of space. Does it have something to do with updating to Vista? If so, will updating to Windows 8 do something similar?

You may have a folder on C called "Windows Old"

Aslo, may be a lot of System restore points.

For most poeple, including myself, Ultimate is not worth it for what it offers over home premium. This will be the case for many users.