This article may contain a link to the Windows Installer Cleanup utility (MSICUU2.exe). If you were directed to this article to solve a problem by using the Windows Installer Cleanup utility, please contact your software manufacturer for installation support on the product, or see the following Microsoft Knowledge Base article for steps to troubleshoot uninstallation issues with products that use Windows Installer:
When you try to install a Microsoft Office program or run an Office program for the first time, you may receive an error message. This article lists common error messages that you may receive, and it contains step-by-step methods that may help you install and run an Office program.
This article is intended for a beginning to intermediate computer user. You may find it easier to follow the steps if you print this article first.
Symptoms of the problem
When you try to install an Office program or run an Office program for the first time, you may receive one of the following error messages:
This patch package could not be opened. Contact the application vendor to verify that this is a valid Windows Installer patch package.
The installation source for the product is not available. Verify that the source exists and that you can access it.
This patch package could not be opened. Verify that the patch package exists and that you can access it, or contact the application vendor to verify that this is a valid Windows Installer patch package.
The feature you are trying to use is on a CD-ROM or other removable disk that is not available. Insert the Office programdisk and click OK.
NoteIn this error message, Office programis a placeholder for the name of the specific Office program that you are using.
If you are signed on to the computer by using an administrative account, you may receive the following error message:
Fatal error during installation
Steps to resolve the problem
Step 1: Download and run Microsoft Fixit 50123 from the following article: