Martinr36
MOST VALUED CONTRIBUTOR
yeah total clean install of windows following these instructions, and while you're deleting partitions delete all the ones on that old drive
Download a new copy of Windows using the Media Creation Tool (Second option on linked page) to an 8GB (min) USB.
Boot that USB and choose a Custom Install.
Delete all UEFI partitions on the system drive (EFI System, Recovery, MSR Reserved, Primary).
Select the unallocated space that results and click the Next button. The installer will create the correct partitions and install Windows.
Run Windows Update repeatedly, even across reboots, until no more updates are found.
You may need/want to download and install the latest graphics driver from the Nvidia/AMD website (they change so regularly the latest version isn't always in the Windows libraries).
This is also worth a watch