To help solve your problem, first consult the resources and links we've listed below. If you still can't resolve your problem, see the bottom of the page for a link to create/send a tech support request.
Troubleshooting Resources
Windows 98/95
Windows 95 Startup and Shutdown Troubleshooter
Windows 98 Startup and Shutdown Troubleshooter
How to Troubleshoot Windows 98 Shutdown Problems
How to troubleshoot Win98 Second Edition shutdown problems
The FixWindows.com Windows 98 Shutdown Problems Flowchart
Windows Me
Windows Me Startup and Shutdown Troubleshooter
Windows 2000/NT
Windows 2000 Startup and Shutdown Troubleshooter/Wizard
Resources for Specific Errors
Windows 95/98 Boots Directly to "Shut Down" Screen
How to Troubleshoot Windows 95 Shutdown Problems
Computer Hangs on Shutdown with Windows Desktop Update Component
Can't start a command prompt, or restart in MS-DOS mode
Can't warm boot computer at Win98 shutdown screen
Computer hangs when you try to restart in MS-DOS mode
Computer stops responding when shutting down Win98
Computer stops responding when you attempt to shut down Win98
Computer stops responding when you try to shut it down in Win98
Problems restarting computer with device using IRQ 12
ScanDisk Runs Even Though Windows Shut Down Correctly
Shutting down or logging off Windows takes a long time
Win98 Second Edition may not shut down or restart in MS-DOS mode