If you try to uninstall avast antivirus, you get the message “You don’t have the correct authority to remove”. Click the Avast antivirus programs, and then click the uninstall button to uninstall avast.You can either search the program by name or sort the list. Here, you get a list of the installed programs.In the settings, select the Apps > Apps & Features.First of all, open the Windows 10 settings using a shortcut key “Windows+I”.Here are the few easy steps below as follows, go through all the steps and uninstall Avast from Windows 10. Since you’ve installed avast, you’re having problems now you should uninstall avast antivirus. If antivirus finds any suspicious file in any program, it removes immediately, causing the programs and games not to run. Although third-party antivirus is advanced, they slow our computer and sometimes remove important program files without our permission. Antivirus is important but is it worth using on Windows 10? The Answer is not very important because Windows security already exists to protect your PC from malware.