SpeedStep problems after cpu upgrade

[db]

SpeedStep will not stay enabled in BIOS, and when I can get it to load the applet into Power Options, it stays grayed out (except sometimes the Advanced button is not grayed out and I will enable it, but it will not take upon reboot).

There seem to be all kinds of fixes for OS *except* W2K.

I would rather not do a clean install of OS, which appears to be the only fix.

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Background:
I upgraded cpu on my old HP Pavilion (n5135) notebook from original Celeron 550 mhz to a Pentium III 900 mhz. It stays at 700 mhz.
Am running latest BIOS.

 

[roguerower]

Use this nifty program: Here

 

[db]

That's a great program, but is for XP and won't install on w2k

 

[fbrdphreak]

I believe for Win2K you need a special Speedstep applet. Do you have that installed?