You can uninstall programs without using the Uninstall Programs applet of the Control Panel or using the Programs own uninstaller, should the need to do so, ever arise.
To do so, open regedit and navigate to the following key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
You will see many keys there. These represnt the installed programs. They may have long numbers or names.

In case they have names, they would be easy to identify and in most cases its UninstallString would point to its un-installers path.

In case they have long numbers, click on each of them till you are able to find the program which you want to uninstall.
Having done that, in the right pane, search for a string value called UninstallString.


Double click on it. From the dialog box which opens, copy its value.

It will look something like this : MsiExec.exe /I{B440D659-FECA-4BDD-A12B-5C9F05790FF3}
Next, open command prompt (cmd), paste the value and hit Enter.
The program will commence installation.

(Information extracted from The Windows Club)