Steps to repair the .NET Framework installation

1. Obtain the original installation source. For example, if you installed the .NET Framework from a CD-ROM or from a DVD, insert that disc. If you downloaded the .NET Framework , download the .NET Framework again. Make sure that you click save to disk. If you installed the .NET Framework from a network share, reconnect to that share.
2. Click Start, click Run, type the following command, and then click OK:
   N:\dotnetframework\dotnetfx.exe /t:c:\temp /c:"msiexec.exe /i c:\temp\netfx.msi REINSTALL=ALL ReinstallMODE=vomus"
   Note Replace N:\ in this command syntax with the original installation path.
   
   Important If you do not have a C:\temp folder on your computer, create one before you run this command.

The Microsoft Windows Installer will verify and repair the .NET Framework installation.

Note This is a "FAST PUBLISH" article created directly from within the Microsoft support organization. The information contained herein is provided as-is in response to emerging issues. As a result of the speed in making it available, the materials may include typographical errors and may be revised at any time without notice.