Computer restarts when powered down
Wonder if anyone can help with this. Whenever I power-down my computer (WinXP Home SP1), it goes through the entire shut down procedure, including powering down the peripherals, waits three seconds then boots up again. The only way I can keep it shut down is to switch off the PSU in those three seconds when power is off!
I have checked that it's not XP re-booting on detecting a failure (option unchecked in System Properties/Advanced/Start-up and Recovery). I have removed all USB items from the mainboard (Gigabyte GA-7VAXP) sockets and put them on a PCI USB hub. I don't have Logitech keyboard or mouse software installed (though my keyboard is Logitech). I have removed all Creative Soundblaster Live software. All my drivers are up to date. I don't have the NT legacy switch in Device Manager. I don't run Easy CD Creator. I have even changed the power supply and checked that the main switch isn't depressed by the front cover of the case!
Any thoughts?