@booja It apears your computer is a laptop so are we dealing with a usb mouse or the trackpad . You may want to check in your bios for peripheral settings reset your bios to default to return the functionality . If you do need to reformat then you can use a key recovery tool like [https://www.magicaljellybean.com/keyfinder/|Majical jeally bean keyfinder] . this will recover your product key so you can use it over again. Hope this helps