How to force uninstall a program you cannot uninstall

1. Click Start and choose Run in the menu (If you're using Windows Vista then press Win+R on your keyboard).
2. Type regedit and hit Enter.
3. On the left side is the registry settings tree, use it to go to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
4. Inside that key you'll find a lot of keys that belong to different programs. Some are named after the program's name, others as a mix of numbers and letters that makes no sense. Look through each of them until you find one that has the key DisplayName (on the right) with your program's name in it.
5. Notice the key UninstallString - this key points to the uninstall program, and the log file usually resides in the same folder as that program.
6. If you delete the key in which you've found the DisplayName key with the value equal to your program's name, then your program won't appear on the Add/Remove programs list