Known issues in the monthly and milestone releases of Windows Vista (905702)

Important This article contains information about how to modify the registry. Make sure to back up the registry before you modify it. Make sure that you know how to restore the registry if a problem occurs. For more information about how to back up, restore, and modify the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows registry

Beta Information

This article discusses a Beta release of a Microsoft product. The information in this article is provided as-is and is subject to change without notice.

No formal product support is available from Microsoft for this Beta product. For information about how to obtain support for a Beta release, see the documentation that is included with the Beta product files, or check the Web location where you downloaded the release.

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Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall your operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.

Milestone Releases

February Windows Vista CTP

BitLocker/Secure startupThere is a potential BitLocker and Code Integrity interoperability issue with the February Windows Vista CTP build. Before starting the BitLocker feature on computers that have 1.2 TPM enabled, you must modify the Boot Configuration Data (BCD) to enable Code Integrity. However, by default, the CTP build of Windows Vista has Code Integrity disabled. This setting allows ISVs to more easily test unsigned software together with Windows Vista. This configuration is viewed by BitLocker as a potential security issue and requires that users navigate recovery mode every time that the computer is disabled.

To activate BitLocker on a computer that has a TPM-compatible device and that is running the February Windows Vista CTP build, follow these steps:

In Windows Vista, click Start, click Programs, right-click Command Prompt, and then select " run as administrator" or "run elevated."
Type the following command and then press ENTER:
bcdedit -set {current} NOINTEGRITYCHECKS false
Restart the computer.
Continue activation of the BitLocker feature.

Note

These steps are not required when you run BitLocker on a computer without a TPM device.

Microsoft Windows Vista Beta 1

Windows Vista Beta 1 may enter standby if a user is not logged into the console session. This issue occurs even if the system standby idle time-out is set to Never in the Power Options tool in Control Panel.

To work around this issue, type the following command at the command line:

reg.exe add HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\AbsentiaPowerScheme\381b4222-f694-41f0-9685-ff5bb260df2e\29f6c1db-86da-48c5-9fdb-f2b67b1f44da /v ACSettingIndex /t REG_DWORD /d 0 /f