This method involves editing the registry. Make sure to have a verified registry backup before editing the registry
Select Start > Run
In the Open: line type regedit and press Enter.
Navigate to HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionUninstall
The Add/Remove Programs list is built from the keys listed beneath the Uninstall folder.
Locate the key for the program that has been uninstalled, right click the key and click Delete.