Hi Nisreen,

Where was your file located? If it was in the same disk you run operating system off of, I recommend removing the disk from your computer as soon as possible and then attaching it to a separate computer, so you can run a recovery tool on it. Though I've never used file recovery software myself, I've seen positive comments about Piriform Recuva (http://www.piriform.com/recuva), so I think it's worth a try. You may want to create an image of your disk before running any tools on it. Another option is to hire the services of a data recovery company, but that could be expensive. Best regards and good luck!

--Roger

The first step "don't make another updates of this folder or this path/driver i.e. C:,D:)

The second step installing a free program sometimes called / free easy recover data 

The third step you should to install the previous program in another path/driver

Finally select the path ,or the folder that permanently deleted. INshaa allah will recover it .

Thanks 

Dear Colleagues,

Good Day,

First of all, you have not specified your operation system (Windows 7, windows 8, etec.) but even though i attached some articles, youtubes and websites for you to see:

http://www.howtogeek.com/169344/how-to-recover-a-deleted-file-the-ultimate-guide/

http://www.youtube.com/watch?v=bQviIHW7m5s

http://www.youtube.com/watch?v=8zPHoAtcrRk

http://www.icare-recovery.com/windows-7-recovery/windows-7-permanently-deleted-files-recovery.html

http://en.softonic.com/s/permanent-delete-files-and-folder-recover-software

http://www.wikihow.com/Recover-Deleted-Files-from-Your-Computer

http://www.remorecover.com/windows/recover-permanently-deleted-files-in-windows-8.html

@ Hazim

Operating System is Windows 7.

Please, see link 2,3 and 4 . if that solve the problem. if not try and download any program from link 5.

Good Luck!!

Nisreen,

Try Piriform Recuva as suggested above by Roger. I used it before and I guess it will find and recover your deleted file. Try in the future working on Dropbox which can keep your files safe and synchronised. Previously, I permanently deleted a folder from my Dropbox which I regretted later on, but I recovered it by taking a copy from another machine of that folder before the "mother source", Dropbox, gets to update its local version on that machine (I had to disable the internet connection for a while though).

P.S. I hope that was not your thesis!!

https://www.piriform.com/recuva

Thank you all,

I could not recover the file, and I have to rewrite  it again.

@ Mr. Abbas,

You are right, it is the first chapter of the thesis.