Why "Windows is shutting down" takes too long

[Guest]

My Dell computer(P4 2.8GHz, 512MB DDR400 RAM, 80GB hard disk) has Windows
XP SP1 preinstalled at the begining. I upgraded it to SP2 by ordering a CD
this October. The Windows Firewall is enabled by default. After installing
the SP2, There isn't any problem except shutting down Windows. When the
screen displays the exact word "Windows is shutting down", I have to wait it
for about 15 seconds. During this time, no sound comes out of the hard disk.
After 15 seconds, the computer can be shut down automatically.

This problem doesn't exist prior to SP2. Who can work out it?

 

[Rock]

My Dell computer(P4 2.8GHz, 512MB DDR400 RAM, 80GB hard disk) has Windows
XP SP1 preinstalled at the begining. I upgraded it to SP2 by ordering a CD
this October. The Windows Firewall is enabled by default. After installing
the SP2, There isn't any problem except shutting down Windows. When the
screen displays the exact word "Windows is shutting down", I have to wait it
for about 15 seconds. During this time, no sound comes out of the hard disk.
After 15 seconds, the computer can be shut down automatically.

This problem doesn't exist prior to SP2. Who can work out it?

You could try the User Profile Clean Up Service:

Troubleshooting profile unload issues
http://support.microsoft.com/?id=837115

To download and install UPHClean, visit the following Microsoft Web site:
http://www.microsoft.com/downloads/details.aspx?FamilyId=1B286E6D-8912-4E18-B570-42470E2F3582

For additional information about UPHClean, view the Readme.txt file. To
download the file, visit the following Microsoft Web site:
http://www.microsoft.com/downloads/details.aspx?FamilyId=1B286E6D-8912-4E18-B570-42470E2F3582