Reset Windows Update
USE SAFE MODE
Press Windows-R, type msconfig and press Enter. Switch to the Boot tab and tick ‘Safe boot’, selecting Network. Click OK > Restart. Once logged into Safe Mode, launch Windows Repair and work through the initial steps to perform basic checks — ignore the power reset if your PC is otherwise OK.
The other three steps — the prescan, disk check and System File Checker — are all essential in case your Windows Update problem is linked to disk errors or has missing or corrupt system files. Work through them one-by-one, rebooting where prompted and then returning to that point in the program.
Once done, click Backup to back up the Registry and Create to create a system restore point. At the next screen you’ll be prompted to either open Repairs or select a preset — select ‘Preset: Windows Update’. Click ‘Start Repairs’. When complete, return to msconfig and untick ‘Safe boot’ before rebooting your PC.