After a recent re-install of Windows 2000 my computer won't shut down when I tell it to. Windows seems to shut down properly, the harddrives shut down and evan the power light goes black, but the fans keep spinning. I have to shut it down completely by holding the power button for 4 seconds. The power management options in the BIOS are set at the values I've always kept them at. Any ideas are gratly appreciated!

According to MS APM is not supported with multiprocessors. I suspect you were only loading the single processor acpi HAL and now you have the multiprocessor hal. see http://support.microsoft.com/default.aspx?scid=kb;EN-US;242495 Now I have fixed W2K systems that wouldn't shut down by running winnt32 and choosing the acpi HAL with the bios acpi enabled. But only for single processor systems According to ms you can't go backwards. See http://support.microsoft.com/default.aspx?scid=kb;en-us;197055

Thanks for the links, but it has worked just fine for more than a year *with* dual CPU:s. But I think you might be on the right track, in the task manager I only see one diagram though "Show one diagram per processor" is checked. I have the ACPI multiprocessor HAL.

I solved my shutdown problem by removing hotfix WM_TIMER Q322913 (non critical) I was installing Win2000 on an old IBN 380ED Thinkpad... After installing service packs, updates, and general programs I noticed that the machine would not automatically restart when requested and would only shutdown to a black screen with the harddrive still running... Updated Bios... read lots and lots about the APM and other possible causes... reformated, reinstalled, same problem... I started to step backwards and uninstall set by step, the WM_TIMER Q322913 hotfix was the 2nd item I uninstalled... everything is now working just fine.

Man u don't have any problem. Your system unit is ATX and you have to have press power button.