Microsoft’s Windows Installer CleanUp Utility, MSICUU2.exe, was a tool one used to remove failed installations and information for programs, that were installed using Windows Installer.
Windows Installer Clean Up utility
While the Windows Installer Cleanup utility was found to a be a very useful tool by many, as it resolved installation problems, it was also recently found to damage some other components of the Windows operating system, installed on the computer.
Because of this reason, Microsoft has removed the Windows Installer Cleanup utility from its Download Center!
Microsoft now no longer supports the use of this tool.
If you still need to or wish to use it you can download it from here.
PS: Microsoft has replaced Windows Installer Cleanup utility with Program Install and Uninstall Troubleshooter.