Symptom:

Windows does not recognize the device in the device manager, the device has a code ("Device ID") ACPI/VPC2004.

AFFECTED CONFIGURATIONS:

The above symptom may occur on the following systems:

All Ideapad and Essentials laptops

SOLUTION:

Download and run the Energy Management from Lenovo support website with the proper Operating System version.

This will install the chipset INF files so that Windows properly recognizes the virtual power controller ACPI/VPC2004.

Visit the following site to download the Energy Management for your machine:

http://support.lenovo.com/en_US/downloads/default.page?

TRADEMARKS:

Lenovo, Lenovo 3000, IdeaCentre and IdeaPad are trademarks of the Lenovo Corporation in the United States, other countries, or both.

Microsoft and Windows are trademarks of Microsoft Corporation in the United States, other countries, or both.

Other company, product, or service names may be trademarks or service marks of others.

Document ID:

IN20100524-007

Last modified:

2010-05-24