The computer I am talking about is a Dell laptop with 320GB hard drive, Core 2 duo running at 2Ghz, 4 GB RAM and 256 MB dedicated video RAM. I just said that repartitioning is not an option, the hard drive is otherwise big enough. So Vista does have 15GB entirely dedicated to it, but it seems that even this is not enough.

I Installed Vista on a 15GB partition and in two months it grew so much so that now there are only 500MB free on that drive. All other software I am using is on a different partition so those 14.5 gigs are just for OS! For one thing it constantly updates and requires restart. But the big problem right now is that I can't install SP1 because it requires 2GB of free space! I tried freeing up some space but didn't manage to get enough. Turns out that the Winsxs folder takes nearly 8GB, and there is nothing one can do about that. Unfortunately repartitioning is not an option at this point. So the only thing I can do is create a new Vista CD with SP1 integrated and reinstall. :wtf: This is my first experience with Vista, draw your own conclusions. If I were you I would definitely stick to XP.