"STOP” ERROR MESSAGES AT SHUTDOWN

Some users have gotten an error message similar to the following when attempting either to shutdown or restart Win XP:
STOP 0000009F, DRIVER_POWER_STATE_FAILURESTOP 0x0000001E: KMODE_EXCEPTION_NOT_HANDLEDSTOP 0x000000D1: DRIVER_IRQL_NOT_LESS_OR_EQUALSHUTDOWN WORKS,
BUT IT’S REAL SLOW
If it appears that Win XP is not shutting down, give it some time. Some users have reported a minute or longer for shutdown to visibly start. Thus far, it appears that this is a consequence of software that is running when shutdown is attempted, and it also may have something to do with particular hardware. If you are experiencing this problem, be sure to close all running programs before attempting shutdown and see if this solves your problem. If so, then you can determine, by trial and error, which program(s) are involved.One specific solution for this was provided by Microsoft support. ” In Control Panel Administrative Tools Services. (You can also get this by launching SERVICES.MSC from a Run box. This utility is also built into the Computer Management console.) Stop the Nvidia Driver Helper service. Many other friends quickly confirmed that this solved this “extremely slow shutdown” problem for them.
POWERDOWN ISSUES
Powerdown issues” are quite distinctive from “shutdown issues.” I define a shutdown problem as one wherein Windows doesn’t make it at least to the “OK to shut off your computer” screen. If Windows gets that far, or farther, then it has shut down correctly. However, the computer may not powerdown correctly after that. This is a different problem, and I encourage that people reporting these issues to make a very clear distinction in their labeling.When Windows XP won’t powerdown automatically, the APM/NT Legacy Power Node may not be enabled. To enable this, right-click on the My Computer icon, click Properties Hardware Device Manager View. Check the box labeled “Show Hidden Devices.” If it’s available on your computer, there will be a red X on the APM/NT Legacy Node. Try enabling it and see if this resolves the powerdown problem.This should resolve the powerdown issue in most cases. However, other factors can sometimes interfere with correct powerdown functioning. In that case, consider the following tips:· If you are changing the default power settings in the BIOS, it can lead to a powerdown problem. Restoring all BIOS power settings to default will likely fix it. OTHER KNOWN ISSUES & HINTS.
BIOS UPGRADE
As with every new operating system that comes along - especially one that is as much of a “step up” as Windows XP is from Windows 9x - the recommendation is made to be sure your BIOS is updated. Many people have reported that this has solved their shutdown problems (and had other advantages) with Win XP, just as it has in earlier versions of Windows.