Hard Drive partially corrupt

I have a user who had a hard drive failure and could not boot.  He told me the screen had been freezing off and on and then the computer just failed.  I took the computer and could not boot myself.  There was a message I believe about corrupt sectors.  I attached his hard drive as a secondary HD on a different computer, and it appeared I could see everything on it.

So I got him a new computer and attached his corrupt hard drive as a secondary drive on the computer.  He told me that he could see all his files on the secondary drive, but only about 30% of them would actually pull up fine.  The rest would not work.  For instance, he could see a music file, but it would not work.  The bad files have an exclamation mark next to them.

Do we have any possibility of recovering the lost data without sending it to one of the expensive recovery businesses?  I believe when I tried to boot it, I tried last known good config and safe mode with no luck.  The disc now is about 30% good and 70% bad.  

(A co-worker just suggested deleting the Windows folder and the Programs folder and then running Defrag to see if that would help).
tomcurrierAsked:
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CallandorCommented:
Try using GetDataBack from www.runtime.org to recover the files.  It is one of the best programs available for doing this.  If it can detect the files, you will need to pay for the program to save the data.
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JamesTX10Commented:
Hi tomcurrier,
DO NOT DEFRAG. Anything that you write to that disk can cause more damage. Backup what you have before trying any recover items.

JamesTX10
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phototropicCommented:
Do not use the disk at all...the less it is used the more chance GetDataBack has of recovering your files...
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nobusCommented:
ok - first try to copy straight what you can.
then , try spinrite :  http://www.grc.com/spinrite.htm      
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nobusCommented:
...and after that, i would do an extensive test on that drive :
http://www.disk-utility.com/hard-disk-low-level-format.html
just to be sure about it's status
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