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Error on Unknown Device in Windows 7 Device Manager

Article ID: 537
Last updated: 04 Mar, 2016
Article ID: 537
Last updated: 04 Mar, 2016
Revision: 6
Views: 1050
Posted: 03 Mar, 2016
by Paul Watkins
Updated: 04 Mar, 2016
by Andrew Sharrad

Symptom

In the Other Devices section, Windows 7 Device Manager can show an error on an Unknown Device that can be mistaken for a TPM module. Details on the device show ACPI\MSFT0101.

In fact this device is Intel Platform Trust Technology (Intel PTT) which is required for security features of Windows 8.x and Windows 10.

Under Windows 7 it performs no fuction and can be disabled in the BIOS.

Intel® NUC model

Solution

D34010WYB, D34010WYK
D54250WYB, D54250WYK
NUC5i3RYH, NUC5i3RYK
NUC5i5RYH, NUC5i5RYK
NUC5i7RYH
NUC5CPYH, NUC5PPYH
NUC5PGYH

This error occurs when you enable the Intel® Platform Trust Technology option on the Security tab in BIOS.

Windows 7 does not require this setting, so you can disable it in BIOS. Windows 8.1 and Windows 10 require this setting for security purposes.

NUC5i5MYHE, NUC5i5MYBE
NUC5i3MYHE, NUC5i3MYBE

To fix the Unknown Device, download and install the Windows 7 and Windows Server 2008 R2* Service Pack 1.

This update clears the error in Device Manager. If you need TPM, upgrade the operating system to Windows 8* or later.

If the error still occurs after installing Service Pack 1, install the Hotfix from KB2920188

Reference article: http://www.intel.com/content/www/us/en/support/boards-and-kits/000006765.html

Applies to:

  • INTNUC-10002 - Intel D34010WYK
  • INTNUC-10003 - Intel D54250WYK
  • INTNUC-10004 - Intel D54250WYKH 
  • INTNUC-10005 - Intel D34010WYKH
  • INTNUC-10009 - Intel NUC5i5MYHE
  • INTNUC-10011 - Intel NUC5i3MYHE
  • INTNUC-10012 - Intel NUC5i5RYH
  • INTNUC-10013 - Intel NUC5i7RYH
  • INTNUC-10014 - Intel NUC5PPYH

This article was:  
Article ID: 537
Last updated: 04 Mar, 2016
Revision: 6
Views: 1050
Posted: 03 Mar, 2016 by Paul Watkins
Updated: 04 Mar, 2016 by Andrew Sharrad
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