Article ID: 975270 - View products that this article applies to.
After you install Windows 7 on your computer, you cannot access the DVD drive, or you can only intermittently access the DVD drive.
This problem may occur if you use one of the following DVD drives on the computer:
To work around this problem, try the following methods in the order in which they are presented.
Method 1: Check for a firmware updateTo check for an applicable firmware update, contact the manufacturor of the DVD drive.
Method 2: Disable the Adaptive Link Power Management (ALPM) featureIf you cannot find a firmware update, disable the Adaptive Link Power Management (ALPM) feature on the computer. To do this, follow these steps.
Note ALPM is a feature that puts a hardware device into sleep state after 100 ms of idle time. This is a power-saving feature. After you disable ALPM, you can still configure the drive to run in any one of three power plans: Performance, Balanced, and Power Saver. However, you cannot still benefit from the additional power saving that is provided by ALPM.
Article ID: 975270 - Last Review: August 16, 2011 - Revision: 1.2