Help Please - I'm out of ideas

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hello

two days ago my computer suddenly restarted and when windows stated up
all of my files were gone and than I'v noticed that windows created a new
user xp.XP-EB****** and that my original files were in my original user
folder named xp
I tried everything but nothing seems to work
can any of U help go back to the original user please I beg U

thnks in advance to all the helpers!!!!!!!1
.

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