I posted a question a few weeks ago re PC settings screen and was given a work around which was to set up a new account and this does work, however, I would be pleased if anyone can advise me where the original problem originates? I have isolated it to "Device Manager, other devices, unknown device". If I delete the unknown device the problem clears immediately and only returns at reboot. Is there a way to remove it permanently so that it does not reoccur on reboot. I have attached 2 screen shots of the Device Manager.