Winrar is a Windows application that allows you to open RAR, ZIP and other compressed file formats on your computer without the need for multiple applications. If you have installed WinRar and want to install a new version or install a replacement application, you can uninstall WinRar through the Add/Remove Programs utility.
Click on the "Start" button, click on the "Control Panel" and then double-click on the "Add/Remove Programs" icon.
Click on the "WinRar" program in the Add/Remove Programs window and then click the "Remove" button.
Restart your computer once WinRar finishes uninstalling from your computer.