I have a PC usng Windows 98 2nd version.  I have a problem that came
right out of the blue---- when I click on "shutdown" the system does
shut down and then immediately starts up again--almost as if I had
clicked "restart" instead of "shutdown".  Can anyone give me the steps
to overcome this problem?

Hi superroy,

1) An easy thing to try is: 
Start / Run 
type " SFC "  
tick "Scan for Altered Files" 
click "Start"
 
If that didn't find the source of your trouble, and to avoid solving
one problem only to cause another, it is best to take your time and
start with the easiest less invasive solutions, and work your way up.
Therefore, I suggest you do some troubleshooting first.

2) Microsoft's article "Problems Shutting Down Windows 98 Second
Edition" here:
http://support.microsoft.com/default.aspx?scid=KB;en-us;q238096

3) Microsoft article "How to Troubleshoot Windows 98 Shutdown
Problems":
http://support.microsoft.com/default.aspx?scid=kb;EN-US;202633

4) Google Groups:  Overview of Shutdown procedure:
http://groups.google.com/groups?q=Windows+98+second+edition+restarts+after+shutdown&hl=en&lr=&ie=UTF-8&selm=TGbv3.4142%24%2593.18856%40news2.atl&rnum=8

5) If you still have the same problem after following the suggestions
in the above articles, the next step is to download the "Windows 98
Second Edition Shutdown Supplement":
http://www.microsoft.com/windows98/downloads/contents/WURecommended/S_WUFeatured/Win98SE/


Additional Links:

Google Groups discussions to browse:
Windows 98 second edition restarts after shutdown:
http://groups.google.com/groups?hl=en&lr=&ie=ISO-8859-1&q=Windows+98+second+edition+restarts+after+shutdown&btnG=Google+Search

Bud's Troubleshooter:
How to Troubleshoot Windows 98 Second Edition Shutdown Problems:
http://www.geocities.com/~budallen/98seshutdown.html

Google Answers: Computer won't turn off:
http://answers.google.com/answers/main?cmd=threadview&id=95308

I hope this helps. If you have any questions or if this doesn't solve
your problem, please post a clarification before rating my answer.

Thank you and Good Luck. Do let us know how it goes!
hummer

You may have wake-on-lan activated in your BIOS or some other
conflicting BIOS power setting.  Make sure your BIOS is properly set
for use with Windows 98 or "Soft Power Compliant OS"

Source: Experience