Installation Guide, Windows Server 2008 R2 v7.0

1. At the EFI shell prompt, run the System Security Configuration command by typing
secconfig tpm off and pressing Enter. The following (or similar) text should display
on-screen:
SYSTEM SECURITY CONFIGURATION
TPM: Enabled
TPM Next Boot Status: Disabled
TPM Vendor ID: 0x15D1
TPM Product ID: 0x000B
TPM TCG Spec Version: 1.2.1.0
secconfig: A reset is required for security configuration changes
to take effect.
2. At the shell prompt, run the Reset command by typing reset and pressing Enter.
3. Reboot the system, run the Device Manager again, and confirm that the “Unknown Device”
error is resolved.
60 Installing the OS