![]() TPM 2.0 has been specified in a way that makes discovery and management less cumbersome than 1.2. The Storage and Endorsement hierarchies, and the Null hierarchy will be used by OS's and OS-present applications. In TPM 2.0, the new Platform Hierarchy is intended to be used by platform manufacturers. Because of this, TPM 2.0 supports 4 authorizations which would be analogous to the single TPM 1.2 owner. Each hierarchy has its own unique "owner" for authorization. In addition to the EH and SH, TPM 2.0 also contains a Platform Hierarchy ( PH) for maintenance functions, and a Null Hierarchy. The Endorsement Hierarchy ( EH) and the Storage Hierarchy ( SH). TPM 2.0 has the same functionality represented by the EK for signing/attestation and SRK for encryption as in 1.2, but the control is split into two different hierarchies in 2.0. TPM 1.2 was specified as an opt-in device. In general, the SRK serves as the parent for any keys created in TPM 1.2. This means the owner has control over both the signing/attestation and encryption functions of the TPM. While using a single RSA 2048b Storage Root Key ( SRK) for encryption. Using an RSA 2048b Endorsement Key ( EK) for signing/attestation. TPM 1.2 supports a single owner authorization. TPM Failure Tries, Recovery Time and Lockout Recovery.If you're experiencing issues with the TPM, the article below discusses lockout scenarious and recovery: Configuring your systemĪt this point you can start to configure your PC the way you want it to run. You can search on the support site using the terms " ", " Windows 10" & " Driver Install Order" to find an article that takes you through the install order for the majority of our Latitude PCs. You can install your drivers from either the Resource DVD that came with your system or you can download the latest drivers for your PC from the Dell Support Site. How to install Windows 10 from the Dell ISO The guide below takes your through installing Windows 10 using Dell media : This includes things like product keys for any non-OEM software. This means that you are starting from a blank disk and will lose anything you haven't backed up or kept a note of for reinstall. Note: Reinstalling your Operating System will format and reinstall your Hard Drive. Tap rapidly on the key when you see the Dell Splash screen as it starts up. Other secrets stored by TPM-capable software (such as Dell Data Protection).Measured Boot remote attestation services may need to be re-enabled or re-enrolled after a TPM mode change, depending on the remote attestation service provider.Measured Boot remote attestation measurement values (enterprise Windows 8.x+).Virtual SmartCard for login will need to be re-enrolled after a TPM mode change.Virtual SmartCard configuration (enterprise Windows 8.x+).The Bitlocker TPM key protector can be re-enabled after the mode change manually or by specifying a number of reboots before the OS automatically re-enables the TPM protector.Bitlocker TPM key protection may be suspended temporarily using the mangebde.exe -disable switch, without decrypting the contents on the encrypted drive. ![]() Note: During the TPM mode change, the TPM firmware update utility will warn you that data stored in the TPM will not be retained, and that the TPM owner should be cleared. You can download the utility on the link below: The Manufacturer Version field should say: 5.81 (1.2 mode) or 1.3 (2.0 mode) ![]() The Manufacturer Name field should say: WEC (1.2 mode) or NTC (2.0 mode) Windows TPM.msc snap-in can be used to visually inspect the vendor and version, as well.įrom a Windows command prompt, Windows search bar, or the Run window in the programs menu, you can launch the TPM snapin, by typing tpm.msc, and pressing the key.įor Dell platforms that support TPM mode changes, near the bottom of the Trusted Platform Module (TPM) Management on the Local Computer (tpm.msc snapin) window, you should be able to see some TPM manufacturer information : For Dell platforms that support TPM mode changes, the output from powershell should include :
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