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A TPM version 1.1 device is not available in Windows Vista

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Microsoft Knowledge Base Article

This article contents is Microsoft Copyrighted material.
©2005-©2007 Microsoft Corporation. All rights reserved. Terms of Use | Trademarks
Article ID: 929706 - Last Review: March 20, 2007 - Revision: 1.3

A TPM version 1.1 device is not available in Windows Vista

View products that this article applies to.

SYMPTOMS

After you install Windows Vista with BitLocker Drive Encryption (BitLocker), a Trusted Platform Module (TPM) version 1.1 device is not available. Instead, a red question mark appears next to the device in Device Manager. When you try to use Windows Update to download a TPM 1.1 device driver, no TPM 1.1 device driver is available.
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CAUSE

This problem occurs because Windows Vista does not support TPM 1.1 hardware. TPM 1.1 does not provide the level of security that Windows Vista requires. Therefore, a universal Windows Vista TPM 1.1 driver is not available. Windows Vista does not recognize TPM 1.1 hardware.
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RESOLUTION

To resolve this problem, use TPM version 1.2 hardware and the Windows Vista TPM 1.2 device driver.
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WORKAROUND

To work around this problem, you can try to use BitLocker in USB-only mode.

For more information about how to configure BitLocker on a computer that does not have a compatible TPM, see scenario 3 in the Windows BitLocker Drive Encryption Step-by-Step Guide (September 2006) document. To obtain this document, visit the following Microsoft Web site:
http://www.microsoft.com/downloads/details.aspx?FamilyID=311f4be8-9983-4ab0-9685-f1bfec1e7d62&DisplayLang=en (http://www.microsoft.com/downloads/details.aspx?FamilyID=311f4be8-9983-4ab0-9685-f1bfec1e7d62&DisplayLang=en)
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STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
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MORE INFORMATION

In response to better standardization in the TPM industry, Microsoft has produced a universal TPM 1.2 driver for Windows Vista. This driver works with all TPM 1.2 hardware.

Third-party TPM 1.1 and TPM 1.2 drivers may be available. However, Microsoft does not guarantee the security or stability of these third-party drivers. We recommend that you install the Windows Vista TPM 1.2 driver.

For more information about TPM, visit the following Trusted Computing Group Web site:
https://www.trustedcomputinggroup.org/ (https://www.trustedcomputinggroup.org/)
Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.

For more information about how to configure drive encryption in Windows Vista, visit the following Microsoft Web site:
http://go.microsoft.com/fwlink/?LinkId=53779 (http://go.microsoft.com/fwlink/?LinkId=53779)
For more information about BitLocker drive encryption in Windows Vista, visit the following Microsoft Web site:
http://technet.microsoft.com/en-us/windowsvista/aa905065.aspx (http://technet.microsoft.com/en-us/windowsvista/aa905065.aspx)
For more information about Trusted Platform Module (TPM) Services in Windows Vista, visit the following Microsoft Web site:
http://technet.microsoft.com/en-us/windowsvista/aa905092.aspx (http://technet.microsoft.com/en-us/windowsvista/aa905092.aspx)
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APPLIES TO
  • Windows Vista Ultimate
  • Windows Vista Enterprise
  • Windows Vista Ultimate 64-bit Edition
  • Windows Vista Enterprise 64-bit Edition
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Keywords: 
kbdriver kbtshoot kbexpertisebeginner kbprb KB929706
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