Lenovo g565 20071 unknown device error

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I just upgraded my Lenovo g565 20071 from Windows 7 Pro 64 bit to Windows 8.  I installed all the drivers except for this error "ACPIVPC2004 Unknown Device".  What could this unknown device be?  Here are the specs of my Lenovo G565 20071:  AMD Phenom X3 2.2 GHz, 2 G RAM.

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Answered By 0 points N/A #163535

Lenovo g565 20071 unknown device error

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Hello Heather,
 
The solution for this error 'ACPIVPC2004 Unknown Device' is that you need to download and run the Energy Management from Lenovo support website with the suitable Operating System version. It will install the chipset INF files so Windows can now properly recognize the virtual power controller ACPI/VPC2004.
 
Visit this following site to download the Energy Management for your machine:
 
Please let me know if I can provide any further assistance.
Have a good day!
 

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