My uncle called me on Saturday asking if I could help with his computer not connecting to his WiFi, even though his phone and smart TV were connected fine.
I was having trouble getting him to do some things for me, so I called on Sunday.

What I found was that the start menu (left click) does not work, search does not work, notifications does not work and settings does not work .. so lack of WiFi wasn't the only issue.
Not having start/search and settings really limited what I had access to, so I took the laptop home with me.

I logged into my account (admin) that I had created the last time I assisted with the laptop and eventually after 45 minutes of "setting things up" I found that my account was also corrupted with the same issues.

I left the system for 6 hours running sfc /scannow via admin Powershell .. in those 6 hours it did not do anything.

At the moment I am on the verge of restoring the system via the hidden recovery partition, however I am also thinking that a clean install from the Microsoft ISO media will be easier

My question - can I still download a clean version of the ISO from Microsoft and would a system that has an OEM key stored in BIOS allow me to activate the clean install?