So, we powered it off and it will not power up. Time to say RIP. (Or stuff it in the closet until I can find someone to diagnose it.)
Have been on my Windows 7 Dell Latitude since then. Works great. VPN stopped working, had to download an updated one from Proton. Still wasn't working. Checked to see the status of the Windows updates, per Proton guy. Turns out the Daughter, who had been using it for her schoolwork, had turned off auto updates. And nothing had been updated since Dec 2017. There were 182 updates waiting. That just took me two days and some fiddling and research, since periodically one would fail. So anyway it's updated and the VPN is now installed and works. So I can limp along on that one.
Have it out in 'the office' for the Daughter to use. So she let me hook up her Windows 8 so I can stream video and surf and do my genealogy. Have it hooked up here at my desk as if it was a desktop - keyboard, mouse, big monitor, external speakers, external hard drive. It's working just fine. For grins I checked to see if she'd been updating it since the VPN wasn't working. 2014. Seriously, 2014. Five years of updates in the que. So, I did those, too. No more support for it unless she upgrades to 8.1, but she says she doesn't want to because she's heard its even more of a train wreck than 8 was. Proton doesn't support VPN on Windows 8 machines, but has sent me instructions for a work-around. That I will deal with some other day when my brain stops hurting. I asked her if she'd ever done backups and she said no, so I created a couple of restore USBs and a repair disk and then did a mirror image of the machine onto my big hard drive. (Oy.) So if it breaks, we may be able to fix it.
Having been on this Windows 8 machine for a couple of days, I don't have much of a problem with it, other than it's a bit slow. Not sure what she doesn't like about it. I know she hates Windows 10 because she says they took administrator rights away from the user. But when I was doing all my Windows 7 research-to-fix-failed-updates it certainly looks as if you can go in and diddle with Windows 10 as you can with Windows 7?