Dont know which windows u have so here is for most of them
Windows 7
From the Start menu, select Control Panel.
In Large or Small icon view, click Programs and Features. If you're using Category view, under "Programs", click Uninstall a program.
Select the program you want to remove, and click Uninstall. Alternatively, right-click the program and select Uninstall.
Windows Vista
From the Start menu, select Control Panel.
In Classic View, double-click Programs and Features. In Control Panel Home view, under "Programs", click Uninstall a program.
Select the program you want to remove, and click Uninstall. Alternatively, right-click the program and select Uninstall.
Windows XP in default XP view
From the Start Menu, select Control Panel.
Click the Add or Remove Programs icon.
Select the program you wish to remove and click Remove.
Windows XP in Classic View and 2000
From the Start menu, select Settings, and then Control Panel.
Double-click the Add/Remove Programs icon.
Select the program you wish to remove and click Add/Remove.