For restarting your PC, first you have to save all your data in the computer than close all the running application. After this, just go to the “Restart” button which is located at the start menu and then simply click on it. At this point, the device will automatically close within few seconds and start back once again. When the device starts again, you just try to install Webroot antivirus again on your PC. Now, when the process complete, check that the Webroot error Invalid Unknown Keycode issue is still persist or not, if the error is still there then follow the next method. webroot.com/safe
Method 2: Check Webroot Subscription Details:
To fix this error, first you have to install the Webroot antivirus on your device. For this, you have to open the Webroot software on your PC. And then click on the “About Webroot” which appears on your computer screen. Now, all the details connected to Webroot on your screen. Then, all the available updates along with the activation status appear on your screen. Just activate and Install Webroot antivirus software on your computer to avoid issues or error in the future. Just press on the “Activate Now” button. Now, fill the Webroot antivirus Key code in the blank box to activate Webroot antivirus. When you complete the installation and activation procedure of the Webroot, you can use the Webroot antivirus again on your device.
Method 3: Uninstall or Reinstall Webroot Antivirus:
Uninstall Webroot Antivirus:
To uninstall Webroot antivirus just click on the “Start” menu icon then click on the “Control Panel”. Now, in the “Control Panel” option, just hit the “Uninstall a Program” which is in the program menu. This will show you a list of installed applications on the screen. Now, choose Webroot option. Just right-click on the Webroot option and select the “Uninstall” button. When Webroot antivirus deleted from your PC, and then restarts your PC to save all the changes you have made. click here
Reinstall Webroot Antivirus:
To reinstall, open your web browser. Then, type the official website, and it will then open up the Webroot page. Just, press the Sign in tab and enter your login credentials to continue the procedure. Now, check the Webroot product and get the one you want. Then, follow all the instructions which are given on the screen to download, install and activate the Webroot antivirus on your device.