FYI - I ran some abbreviated Vista tests over the weekend and did not run into the problems that ekyk2001 reports. On my vanilla setup there appears to be no security issues.
ekyk2001 - it appears that there's something unique to your environment (added security?) that's keeping CC from installing or it could be that the initial installation was corrupted and causing the issue. If you'll send me an email directly, I've got one thing for you to try that might help.

