Get Rid of Installation Headaches with Windows Installer Cleanup Utility

With the RTM release of Office 2007, It was time for me to install it. But, there was just one single problem: There was no upgrade path from Office 2007 Beta 2 TR to RTM. I just figured, "No Problems, I'll just uninstall it".

No Problems, eh? I uninstalled it, but still no luck: Office 2007 RTM installer just kicked me out saying that I still have "Pre-release versions of Office installed". Even after kicking me all the Registry Keys that said "Office" from the Registry hive, I still had no solution...

Drumroll please. In steps this Windows Installer Cleanup Utility. Removes the Setup Information alone for just about any installed program. Saved me a ton of headaches...

Thanks to Brian M of the Microsoft Technet Forums.