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ACPI complaint virtual power controller seems as unknown device under “Device Manager”


OS works properly but under "Device Manager" ACPI is not recognized by OS


The above symptom may occur on the following systems:

All Idea Laptop


1. Go to , click "Drivers and Downloads" and select your product

2. Download the Power Management Driver (Lenovo Energy Management)

3. Install the exe file to your laptop .

4. Restart the computer.

5. It will take effect after restarting the computer


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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.

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Alias ID : IN20100621-008
Document ID : HT071784
Legacy Document ID : 12771167781673
Last Updated : 16 May 2014
Copyright © Lenovo 2013, all rights reserved
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