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What OS did you UPGRADE from?
Was it WIndows 7, or Windows 8?
For windows 7 upgrade to Windows 10:
The upgrade puts all of the files from the Windows 7, in a folder called Windows.old
IN this folder will be all the files you had on Windows 7. Do not delete it.....or they will be gone forever.
However, you DO want to copy the files FROM the windows.old folder, as quickly as possible to an external hard drive.....or back them up SOMEWHERE!
Are you logged into Windows 10, as a TEMPORARY PROFILE?
Go to Settings > Accounts > Sync your settings. If you’re signed in with a temporary profile, you’ll see a message at the top that says You are logged on with a temporary profile. Roaming options are currently unavailable.