- Uninstall ALL Beta everything
- VS Add-Ons
- Uninstall Microsoft Windows SDK 6
- Reboot and attempt VS2008 installation again
I also uninstalled Sharepoint Designer, as I have seen issues with this before, but it does not appear that this is not an issue/problem source. Several of my coworkers who had similar experiences were able to install VS2008 without removing Sharepoint Designer so there is not need to worry about that.