So is the problem fixed?
<quote>
Whether or not APM is enabled makes a difference — but the effect could go
two ways. Some users report that XP reboots on shutdown if APM is enabled,
but shuts Windows down just fine if APM is disabled. Other users report
exactly the opposite behavior. According to Jack Dunne, this is similar to a
known Windows 2000 problem. The issue seems related to the computer’s
specific hardware or BIOS — so, as with all NT operating systems, stick to
the Hardware Compatibility List where possible.
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 (Tip from Terri Stratton). Or, to check the other side
of the APM/ACPI coin, open the Power Options applet in Control Panel. If
there is an APM tab, make sure the “Enable Advanced Power Management
Support” box is checked.
Also see...
Your computer stops responding when you try to shut down in Windows XP
http://support.microsoft.com/?kbid=313290
<quote>
from...
WINDOWS XP
SHUTDOWN & RESTART TROUBLESHOOTING
http://aumha.org/win5/a/shtdwnxp.php
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Hope this helps. Let us know.
Wes
MS-MVP Windows Shell/User
In