If you locate a BIOS update, examine the documentation, or contact the manufacturer to determine whether the update includes changes to resolve the power management problem.
Note Sometimes the documentation may not include information about all the changes that the BIOS update includes.
Use the manufacturer's recommended BIOS update tool to update the computer BIOS.
Step 2: Examine the BIOS settings
Incorrect BIOS settings may cause startup problems or shutdown problems in Windows Vista. Examine the BIOS settings to determine whether the BIOS is configured correctly. For more information about the correct settings for the computer BIOS, contact the computer manufacturer.
Note Although this is not a common scenario, you may experience computer startup issues if you reset the BIOS configuration to its default settings. Therefore, we recommend that you contact the computer manufacturer before you modify the computer BIOS.
Step 3: Troubleshoot third-party power management programs
Examine the computer to determine whether any third-party power management programs are installed. Sometimes, a program that is designed for one particular operating system and BIOS version does not work with other operating systems or BIOS versions. To help troubleshoot this issue, disable or remove power management programs that are not designed for Windows Vista. Visit the program manufacturer's support Web site to help determine whether a particular program is supported for use with Windows Vista.
For information about how to contact computer program manufacturers, click the appropriate article number in the following list to view the article in the Microsoft Knowledge Base:
65416 Hardware and software vendor contact information, A-K
60781 Hardware and software vendor contact information, L-P
60782 Hardware and software vendor contact information, Q-Z
Windows Vista Business, Windows Vista Enterprise, Windows Vista Home Basic, Windows Vista Home Premium, Windows Vista Ultimate, Windows Vista Enterprise 64-bit Edition, Windows Vista Home Basic 64-bit Edition, Windows Vista Home Premium 64-bit Edition, Windows Vista Ultimate 64-bit Edition, Windows Vista Business 64-bit Edition