A Windows 2000 VM may perform badly and consume high CPU


Just had a couple of issues where a Windows 2000 VM was apparently slow and consumed >80% CPU.


They had in common that they have been converted (P2V) from real hardware with multiple processors.


Now, in Hyper-V, they run with the one supported processor, but still with Multiprocessor HAL and Kernel.


After changing that to ACPI-Uniprocessor-PC, the VMs performed as expected.


To change HAL and Kernel, use Device-Manager, Computer, Update Driver, and select ACPI-Uniprocessor instead of ACPI-Multiprocessor.


 


(Kudos to André Roos)


 


Cheers


Robert 


  


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