Long story long ... but has good info and a reasonable ending for me.
I'm running Win10 Ver 20H2. I needed to install some software to program a brand of PLC I'm not fond of (so off to bumpy start before I start). I start the installer and the machine freezes. Then it reboots; the Dell BIOS screen comes up fine, but then it "blue screens". I'd never seen a Win10 blue screen of death. It can't jump to Windows; it reboots, Dell BIOS, can't jump to Windows. Lather, rinse, repeat.
I've been bricked.
Had to create a "boot stick" USB drive (two hours I'll never get back) and boot from that. Using that I found the machine had created a restore point at 0400 hours that morning. (I got really lucky there.)
I was able to restore the machine. < big exhale >
Seems the software's (InstallShield) installer doesn't check to see if you have the software license manager installed and it's mandatory before putting in the software. Nothing in the docs; no warning from the software installer. Just the blue screen. Worse? When I called tech support they admitted about half the time they brick machines for this very issue.
So, go get license manager to try again. But beware -- use the license manager for my Ver 20H2 says the download page. (First good info in any of this.)
Finally get manager and software installed.
But wait ... there's more!
Over the weekend I took a big Windows Update push. And after that my (didn't realize it was configured when it saved me) automatic restore point creation was shut off by the update!
An auto restore point saved my bacon.
If you took a Windows push in the last week or so, you might want to see how your machine is configured.