Did you get an error while trying to download the Microsoft cleanup tool/ uninstaller or an error
after downloading and opening the tool? Microsoft Silverlight won't install
If you tried uninstalling and reinstalling and Silverlight still won't install, the plug-in may be only partially installed, or some files may be corrupted or damaged. If this is the case, make sure that you're logged on to the computer as an administrator, close any open browsers, and then try the following:
- Verify that Silverlight no longer appears in the list of installed programs. If Silverlight still appears, uninstall it.
- Download and run the Microsoft Windows Installer CleanUp Utility to remove installation information about Silverlight.
- Delete the Microsoft Silverlight folder from the Program Files folder on your computer. Typically, the Program Files folder is located on the root of C:\ drive.
- Delete the HKEY_LOCAL_MACHINE\Software\Microsoft\Silverlight registry subkey.
- This step entails editing the registry. Back up your registry before you continue.
- Start Registry Editor.
- Back up your registry. On the File menu, click Export. Select a location and enter a name for the backup file, and then save the file.
- Delete the subkey. After you've backed up your registry, locate the HKEY_LOCAL_MACHINE\Software\Microsoft\Silverlight subkey and delete it.
- Install Silverlight. Go to the Silverlight installation website. Under Install Silverlight, click the link to download and install the latest version of Silverlight.