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#1
Boot failure after restart - error code 021 seems to be trying to load
Upgraded from 8.1 to 10 a couple of weeks ago. Running reasonably well. Today I powered down the machine and it will no longer boot. No changes were made before powering down. It starts booting and goes to a BS with error code 021. I tried a couple of times and I got a screen that let me choose the OS. I chose "other OS" once, and WIn 10 on a second try.
Note: after the Win 10 install two OS choices appeared at boot time. It did not seem to default to 10. The second was 8.1. Apparently MS left it there in case I wanted to go back. I tried it once a bit after I installed 10 and 7 did not work.
When it boots, the symbol on the screen is, I believe, the one for 8.1. My guess is that for some reason the boot record has been changed. But no idea how to do anything about it. With the machine running I have no way to even look at the UEFI boot record. I just can not seem to make it boot 10.