1. Open Regedit.  2. Registry key: HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\TPM  Navigate to: DWORD: OSManagedAuthLevel  3. Change the value from 0 to 4 (decimal) 4. Reboot. TPM should be available to work with now. 5. Read Link Source: [URL]  Be sure to understand the consequences of where the TPM authorization is stored. 
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. My laptop is Latitude E6530.
TPM Legacy Mode