Uniprocessor & Standard PC in Dev Manager

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Running XP Pro SP1 with mobo MSI 6738. Bios is up to date but I have to
power off manually, no autoshutdown.
In Dev Manager the Computer is listed twice, as Standard PC and as ACPI
Uniprocessor PC. I can uninstall the latter, which I don't want to do,
but Standard PC has no uninstall option. Does anyone know how I can get
my autoshutdown back please?

BJ

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