IMPORTANT:
The Microsoft Installer Cleanup Utility (MSICU2.exe) has been retired because it could damage some of the files on the computer. The tool has been replaced with a new Install and Uninstall Fix it, you can download and run the tool from here:
http://support.microsoft.com/kb/2438651
Updated December 2010
Hi Gnugs,
Windows Installer CleanUp Utility works correctly in all 32-bit and 64-bit versions of Microsoft Windows. If you have an earlier version installed on your computer, we recommend that you download and install this latest version.
You can use the utility to remove installation information for programs that were installed by using Windows Installer. Be aware that Windows Installer CleanUp Utility will not remove the actual program from your computer. However, it will remove the installation files so that you can start the installation, upgrade, or uninstall over.
When you use Windows Installer CleanUp Utility, you can perform the following functions:
• Select one or more programs that were installed by Windows Installer from the Windows Installer CleanUp dialog box.
To do this, select the programs that you want in the Installed Products list in the Windows Installer CleanUp dialog box. After you make this selection, the utility removes only Windows Installer configuration information that is related to those programs.
• Remove all Windows Installer information associated with the selected programs. This includes the entries for the programs in the Add Or Remove
Programs item in Control Panel. Be aware that only the Installer information for that particular program is removed, not the files.
Windows Installer CleanUp Utility does not perform the following functions:
• Remove Windows Installer
• Remove files of any programs that are installed by Windows Installer, such as Microsoft Office 2003
For more information visit http://support.microsoft.com/kb/290301
Hope this information is helpful.
Umesh P - Microsoft Support