To the right of the list item, click the Uninstall
button and Boost will completely remove WinRAR 4.20 (32-bit) from your PC.
How to Manually Uninstall WinRAR 4.20 (32-bit) (with Windows)
Use Add/Remove Programs control panel in Windows makes to uninstall WinRAR 4.20 (32-bit). Follow the appropriate instructions below to use this control panel.
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 WinRAR 4.20 (32-bit) from the list of programs, 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 WinRAR 4.20 (32-bit) from the program list, and click Uninstall. Alternatively, right-click the program and select Uninstall.
Windows XP
From the Start menu, select Control Panel.
Click the Add or Remove Programs icon.
Select WinRAR 4.20 (32-bit) from the list of programs and click Remove.