Hello sir, i recovered some imported data from my corrupted hard disk (WD2500js) but after that i could not install the windows on it. I have partitioned it three times but didn't affect. i think i need a disk manager for this hard disk so that disk manager adjust the internal settings on default of the hard disk!!! What do you suggest??

you can recover crashed hard drive with some data recovery program, recommended asoftech data recovery
http://www.facebook.com/pages/Asoftech-Data-Recovery/290956907592436?sk=info

maybe you HDD system is corrupted, try to recover it if your can....

otherwise,back up your important files and format,re-install new system software..

you could run the check disk utility
click start run type cmd then type chkdsk/r/f which will automatically fix any corrupt files on your hard drive or
go to control panel administrive tools computer management you can right click on the drive select properties tools check now?tick in both boxes to scan for and repair/recover any bad sectors and automaticall fix any corrupt files
in xp
hope this helps

i just used the scanning process from its property and then got the backup by windows from the properties of hard disk.After doing this all the folders were working.

Well, in your case you should format the external drive and then try some so-called data recovery software.

First of ALL - Connect your hard drive to your personal computer. And install this software Wondershare Data Recovery on the computer in order to perform data recovery. Get the program from its site.
data recovery (for Windows OS)
Mac data recovery (for Mac OS X)

Good luck. I hope that my reply has shed some light on the problem!