And folk have yet to figure out the files on a PC are not safe. No matter how many times folk lose files, they have yet to figure this basic thing out.
"We only lose what we don't backup."
And now with smart phones I'm seeing more loss and more folk blaming the makers.
OK, about finding those files. I like to search with the command line. It's all of one command which has been around for over 3 decades. If it's on the drive, you usually can find it.
My mother got a "new" computer with Windows 7 on it and adjusted to the change fairly well. Several weeks later, she told me that Windows 10 sudenly appeared and she was not happy about it. I'm aware of the Old Computer file that existed after the update, but when I found out she had been hijacked (that's what it is when somethng is dumped on you without permission) by Microsoft, the file was gone along with the corresponding recovery. Is there anyway to restore Windows 7 to her computer, and are the files she lost still on the hard drive somewhere? She's pretty computer savvy for a 93 year old, but I wish she had complained to me earlier.

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