TPM Legacy Mode

I am trying to Initialize TPM on windows 8.1 and it is saying..

"Your TPM is currently running in Legacy mode. If you'd like to use TPM application for this version of Windows, Please contact your administrator."

Now I have clear TPM once. Disable and enable it in BIOS still no change. I am using UEFI bios and secure boot is enabled.

Can someone suggest how can I enable TPM coz I need to encrypt my hard drive without TPM it is a very hard thing to do.

November 7th, 2013 1:01pm

Hi,

How did you intialize TPM? Was your computer in domain environment? Did you log on with the administrator account?

TPM and Secure Boot could work together and having both TPM and Secure Both will enhance your PC security.

Please refer to the following article to check your configuration.

http://technet.microsoft.com/en-us/windows/dn168169.aspx

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November 8th, 2013 3:06am

I am using administrator login. This laptop is standalone not in domain env. I run this tpm.msc command and than click on Prepare the TPM.

Than it gives me an message that TPM is running in legacy mode.

November 8th, 2013 3:09am

there is a key OSManagementAuthLevel .. that seems to control if the tpm runs in legacy mode.

It can be changed using local policy or domain policies

(Configure the level of TPM owner authorization available to the operating system)

If your machine is not in the domain I would set that to full

(or in registry to 4)

http://technet.microsoft.com/fr-fr/library/jj679889.aspx

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February 12th, 2014 9:48pm

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