Removing a Program for the Add or Remote Programs List
Many users will delete an application to save more disk space, and as luck would have it, there wasn't an uninstall utility included with it. How can the user get these applications off their Start menu? By following the steps shown here, you can uninstall any and all applications, leaving not a trace on your workstation:
Open Regedit by typing regedit from the Run menu.
Find the key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall. This key contains a key for every application that can be uninstalled. Find the key with the name of the program you want deleted and then delete it.
Continue with step 2 for every application you want uninstalled from the system you are working on.
If you are unsure whether the application's key you are about to delete is the correct one, check the DisplayName and QuietUninstallString names. The full name of the application is typically included in the string.