VS 2003 - Reboot required but there's nothing to reboot!
I've seen several posts around installing VS 2003 where VS detects a reboot is required before it begins the install.
Customer rebooted the box, relaunched VS, and again, they're told a reboot is required.
This problem is documented and a workaround is available at:
I have not seen any reports of this issue with VS 2005.