Sony VaioPCG-6J1M win't shutdown / restarts

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As I'm a regular lurker, I hope you guys don't mind if I ask this question here. (Posted elsewhere)

Machine has just been restored, and when asked to shutdown, it restarts.

I've googled, and have had no luck so far.

Has anyone got any ideas?

I've tried these sites

Windows XP restarts when you try to shut down your computer

Windows XP Shutdown Troubleshooter

I've already use 'My Vaio' to update the machine.

I've applied XP SP3

No joy...

Edited March 16, 2008 by www.dublinPCservices.com