Dell Latitiude D630 Speed Step? problem

I have a Dell Latitude D630 that has an Intel Core 2 Duo with 2.50Ghz.  The user says it suddenly got much slower and a check of the processor says it's running at 772Mhz instead of 2.50.  I updated the BIOS and checked the BIOS settings. Speed Step is on and claims that off would set to the lowest.  I have performed anti-malware scans, no new applications, disk is defragmented, etc...

I set the power option to 'Always on' - No change

I looked in the dell area for 'Microsoft Speedstep fix for XP' and found some but none will execute on the Latitude D630 - Says not supported system.  I checked the downloads and updates on the Dell support site and couldn't find anything for that particular system.

The physical machine is very clean with no obstructions to the vents and the fan seems to be working just fine.

Any suggestions?
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getzieAsked:
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JohnBusiness Consultant (Owner)Commented:
Speed Step is supposed to work that way.  

Look for CPU-Z (Google) and install it. It is free. It will show you how CPU speed changes for varying loads.

The thing is that Speed Step lowers CPU frequency very quickly, so you need to check frequently.

See if that sheds any light. ... Thinkpads_User

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Raymond PengSystems EngineerCommented:
Have you tried HW diagnostics from Dell Boot CD or onboard diagnostics?
getzieAuthor Commented:
Cool.  Thanks.  I'd forgotten about CPU-Z.  I hadn't run the Dell diagnostics but I will now.
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JohnBusiness Consultant (Owner)Commented:
Hello getzie: Any follow up?   … Thinkpads_User
getzieAuthor Commented:
Not yet.  Early this week I hope.  The user has indicated that he may rather replace than allow me to troubleshoot further... which would be too bad but the machine is of a certain age.  Certainly by Tuesday I'll know.
getzieAuthor Commented:
Thanks guys... The user works remotely and decided to replace the machine so I won't get to play with it further.
JohnBusiness Consultant (Owner)Commented:
Thank you and thanks for the update.  .... Thinkpads.com
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Windows XP

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