Speed - Possible Hardware Problem?

Greetings,
My laptop is a Satellite L655-S5058 running Windows 7 (64) and is approx. 3.5 years old. I recently noticed severe speed/response issues and none of the usual fixes were working. So I did a complete recovery, basically restoring it to its "out-of-box" condition. After doing that, the only thing I did was apply all the outstanding "urgent" MS updates to bring it back to date. I haven't restored any of my personal data or reinstalled any new programs...and it's STILL painfully slow, just like it was before. So now I"m wondering if there's a hardware component that could be causing this. I ran a diag using the  built-in Toshiba utility, but it looks like a very quick test and it found no problems. I also used the WMD I downloaded from Microsoft to test the memory, but that found no problems.
Any ideas what else it could be? Is there a better utility I can download to test the hardware more thoroughly? I haven't been able to find anything.
Thank you in advance for any assistance.
Solved!
Go to Solution.

Satellite L655-S5058
When the hard disk is failing, multiple reads and writes must be made for success.
   Check a drive for errors - check for both file and physical errors
-Jerry

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    company: Microsoft Corporation
    description: NT Kernel & System
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    company: Microsoft Corporation
    description: NT Kernel & System
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    company: Microsoft Corporation
    description: NT Kernel & System
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    company: Microsoft Corporation
    description: NT Kernel & System
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