I tried to
restore it AutoCAD, but nothing happened. I am using AutoCAD 2014. The file was
created in a similar version of the program. I created it is not very long, but
a couple of times a clean computer from unnecessary files including  the location of temporary files. And in the
end when I need them, I do not have backups. I know that a little too far with
cleaning my computer, but I need a drawing which is in this file. Please tell
me how to recover it. No special computer problems were not in the last couple
months. No viruses, breakdowns system failures. But the file is broken.

You broke the file then you cleaned the computer?  That about sealed your fate.  You can kiss that drawing goodbye.  Next time you use AutoCAD set it up to AutoSave every 15 minutes and also check off the box for creating backup files.  Then get in the habit of doing a hard save every 30 minutes or whenever you have made substantive changes to the drawing.  It's a tough but invaluable lesson you have just learned.  I hope you remember it going forward.One more thing....most programs that are used to clean up files on a computer have an option to undo their work.  You should have taken advantage of the opportunity to create such a file.  Once again you only have yourself to blame.Computers + humans = trouble.
John Connor2014-11-27 13:17:21