I\'ve had a serious issue with my Visual Studio 2008 setup. I receive the ever-so-useful error \'A problem has been encountered while loading the setup components.
I think this sort of question is entirely appropriate to the forum, especially if an easy solution can be found, as would save others hours of pain.
Unfortunately I dont have the solution, but would suggest (if you haven't already)
Run FileMon to see if the installer is looking for specific files which are no longer there - this may give some clues.
Painful, but try uninstalling other apps based upon the VS shell (eg 2005) first.