computer will not shutdown

[fobesq]

for about a week, my pc will not shutdown. it restarts.
also, the "standby" option is not functioning (it is not
lit like the shutdown and restart options. Any
suggestions? (have run all antivirus diagnostics and
downloaded patches)

 

[Thorsten Matzner]

for about a week, my pc will not shutdown. it restarts.

See "Windows XP Restarts Unexpectedly or Restarts When You Shut Down
the Computer" (http://support.microsoft.com/?kbid=320299).

 

[Jim Eshelman]

for about a week, my pc will not shutdown. it restarts.
also, the "standby" option is not functioning (it is not
lit like the shutdown and restart options. Any
suggestions? (have run all antivirus diagnostics and
downloaded patches)

If the article Thorsten reocmmended doesn't solve the problem, see the
"Rebots On Shutdown" section of
http://aumha.org/win5/a/shtdwnxp.htm