It requires about 10 gig disk space – I only had about 3.5gig. Scott Hanselman recently wrote a blog post on how to Freeing up Disk Space under Windows 7.
I’m normally quite skeptical on these suggestions. 9 times out of 10 they are common sense.
Long story short, I did the first 4 steps (he has about 10 more) and I got back almost 20 gig back!
Who’d have thought?