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windows 10 reverted unexpectedly to windows 7 and lost all data

phoffric asked
Last Modified: 2016-09-28
My son had upgraded from Windows 7 to WIndows 10. Today he was on Facebook, logged out of the PC, and when he came back 6 hours later, he saw that he now had Windows 7 and all his files appeared to have disappeared. I asked him to shut down in the slight hope that his data might be hidden away somehow.

Has anyone heard of this magic happening before?
Do you think there is a chance that his data is there.

(I had suggested last year that he have automatic backups, but he never did that. He has a 1 TB disk with backed up data, but hasn't updated it for months. I think he will do the automatic backup from now on.)

Thanks in advance,
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