Dang... You got me on this one. Have you contacted support on this? Let me think about it tonight and if I get a wild hair, I will tell you more.

the only thing might be another program getting in the way. Sometimes antivirus software can hang things up when they are checking the file... Have you tried disabling your antivirus during install?

this is all the crap I have heard to try... that I can remember at midnight anyway...