Download the Windows Media Creation Tool (2nd option on the below link)
https://www.microsoft.com/en-ca/soft...load/windows11
It will need a USB drive at least 8GB in size, then once it's done you plug the USB into the laptop before you power it on and boot from it. Then you can reinstall Windows from scratch. It might ask you for the serial #, but you can skip that question since the BIOS will have it hard coded