Hi all,
even though this thread is of several month old, Google shows it for the query 'unlock drive' so some people might find useful what I say.
So, I also have the same issue, with total Windows freeze short after startup, so absolutely unusable. But, disregarding the root cause, whatever it is for everyone, the problem with 'unlock drive' is most likely caused by the USB used. When you load from
USB and try to repair your Windows, unfortunately it is too stupid to understand that USB is not an option for repair and still considers its Windows folder as a valid OS installation! And same reason for the message 'Restart and choose Windows installation'
bla-bla. Both problems have the same cause.
In my case I am lucky to have a recovery partition created during my previous installing Windows, you know that small area on disk where some emergency tools are. So I can start repair from that area, NOT from USB. And that works, both System Restore,
System Refresh etc. Also there is available option 'Startup Options' and you can restart in Safe Mode etc from there. I have not tried, but for those who need it, you can try 'shutdown -s -o' from Cmd from your USB recovery. This should restart and give you
the startup options like Safe Mode etc. Then when finally in Safe Mode (if you are lucky to reach it) you may try see Event Log, run SFC /SCANNOW and run Defender to see if you have viruses. When you do so, you'll definetely have some more information, at
least to decide if you really must re-install only.
Finally, about booting from recovering partition. Usually, if you have it, Windows tries to load from it after two failed starts. So you may try to do two 'hard restarts' with a button or something like that. Sorry no recipe here since it always goes like
some roulette, you just need to play, try etc.
Good luck everyone!