My Windows 10 PC has reached the end of supported OS, but I cannot install an update

[DonaldsRump]

16. Really appreciate this suggestion: it worked! (almost)

I made the USB boot disk using the Windows link you posted, and I was able to get back on to my computer! Thank you. That's a relief. At least I can now access my personal files.

There is one problem, though: when I remove the USB boot drive, the PC starts up for a second and then restarts. I see the Dell logo on the screen for a couple of seconds, the screen goes blank, and then starts over again in an infinite loop.

If I insert the boot disk, I am able to get into my PC and can see my files. This time, I will save them to other media.

When I was on my computer, I tried to do the Windows repair, but it said it couldn't. I was able to do a system restore, but only to a few hours before. Still, when I remove the USB drive, I can't get the laptop to work.

Should I just reinstall Windows 10 and be done with it? If so, should I reformat my SSD? Also, should I partition the SSD before reinstalling Windows 10, separating the OS from personal files?

I've had some experience doing this in the past, but not much. I'm looking for the quickest way to have a functioning up to date laptop, so all recommendations are happily welcome!