Hello everyone i dont know if i posting my topic in right place or not.

i tried to install win 10 on my laptop so i insert a DVD and selected my partion (old windows) and format it . then there was an error prevent me from installing new windows (windows cant be install on this drive) . then i visit youtube and saw a movie showed to use a trick (shift + f10 then write select part then clean )

here is the youtube link :
https://www.google.com/search?q=windows ... 0&bih=560#

then it's completly deleted my whole partitions instead of one i selected.

please Help me i had very important files ☹☹

You might have to post over in community spiceworks's forum labeled Data-Recovery. If you do, upfront admit you have a thread here.
While there are very excellent data recovery folks in here (I am not one of them - I'm only a beginner DR) -- it may not hurt to also ask a forum specifically designed for data recovery.

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"Take care of thy backups and thy restores shall take care of thee." Ben Franklin revisited

FWIW, to OP I wouldn't follow the advise to visit the spiceworks forum.

If it were my drive, assuming it's a mechanical drive:

Download DMDE.

1. Clone it. By cloning I mean create a sector by sector copy or image file. Can be done using DMDE too, many prefer ddrescue.

2. In DMDE, select physical devices > Select patient drive > OK > post screenshot, you may be able to repair in-place. Tag me or fzabkar. -or- other safer option, pick largest partition and select open volume. Does it see your files? Yes, recover them to another drive. No? Try the full scan option.

If you decide DMDE looks too intimidating try ReclaiMe. IMO the most user friendly, yet powerful file recovery tool out there.

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Joep - http://www.disktuna.com - video & photo repair & recovery service

+1 Arch! I have heard success stories about DMDE and ReClaiMe. I hope OP gets the stuff back real soon, and reports back soon.

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"Take care of thy backups and thy restores shall take care of thee." Ben Franklin revisited

win 10 making this to so many users . I earn money. Lol

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Sexy Womans from your town