The sequence of events is roughly:
switch on PC
PC boots & Windows starts
log-on to windows with password
(if I don't connect to Internet there is never a restart problem no matter what)
start IE or Outlook
(no problem working off-line)
connect to my ISP
then anytime between about 10 seconds to about 3 minutes later PC restarts and reboots windows. Before it restarts there often is time to receive & send e-mails so the connection to the internet seems fine.
If I go round this restart cycle two or three times the PC stays on and is stable. Once stable I can connect & disconnect from my ISP at will & leave pc running 24 hour or several days without problem.
Sometimes having other aps open before I make first connection to my ISP seems to reduce the likelihood that PC decides to restart.
I regularly use Spybot Search & Destroy; XoftSpy to check what is going on. Also have McAfee. And unregistered copy of AdwareAlert. Have now got Hijack This.
Does this problem sound like malware or is some other effect at work? I discussed it with local PC shop & they hadn't got a clue.
Hope I'm not time wasting here.
Thanks in advance