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windows error code oxc000021a
Hello, hoping someone can help me out with this.
I upgraded to W10 a few weeks ago from W7. All went well.
Then 2 days ago i got the windows error code oxc000021a, and the computer wouldn't start. Couldn't get into safe mode, and repair didn't work either. Really annoying. I've had to reinstall windows 7. I can still see my windows 10 old install saved under windows.old.
I don't have any option yet to re-upgrade to W10, despite putting all the updates on W7 again. What can I do to get W10 again and recover my data from windows.old?
Any help greatly appreciated. Thanks!