Hello Irwin
It appears you have been infected with the Blaster virus or one of its
variants.
If your computer is constantly attempting to shutdown
or reboot, quickly go to:
Start > Run and type: CMD , and hit enter.
This opens the Command Prompt window.
Then type: shutdown -a , and hit enter.
This should halt the rebooting problem.
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Then immediately turn-on Windows XP's built-in Firewall:
http://www.microsoft.com/security/protect/
Special note if you use AOL:
America Online installs its own connection settings that override
the ones that come with Windows XP. America Online's
connection settings don't include a way to turn on Windows XP's
built-in firewall.
Visit the following web site for instructions on downloading
a FREE firewall program for your computer.
Ref:
http://www.updatexp.com/free.html
What You Should Know About the Blaster Worm and Its Variants
http://www.microsoft.com/security/incident/blast.asp
A tool is available to remove Blaster worm and Nachi worm infections from
computers
that are running Windows 2000 or Windows XP
http://support.microsoft.com/?kbid=833330
MS03-039: A Buffer Overrun in RPCSS Could Allow
an Attacker to Run Malicious Programs
http://support.microsoft.com/default.aspx?kbid=824146
Be sure to visit MS Windows update site and download all the critical
updates, this is for your security and safety.
http://v4.windowsupdate.microsoft.com/en/default.asp
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Hope This Helps
Haus
Not a MS-MVP
Not a MVP
Not nothing, just a good ole boy.