TPM Service Defaults in Windows 8

TPM Driver.

Default Settings

Startup type:Manual
Display name:TPM
Service name:TPM
Service type:kernel
Error control:normal
Group:Boot Bus Extender
Path:%SystemRoot%\system32\drivers\tpm.sys
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\TPM

Default Behavior

The TPM service is a kernel device driver. In Windows 8 it will not be started until the user starts it. If TPM fails to start, the error details are added to Windows 8 error log. When the operating system startup is complete, the user is being notified that the TPM service hasn't been started.

Restore Default Startup Configuration for TPM

1. Run the Command Prompt as an administrator.

2. Copy the command below, paste it into the command window and press ENTER:

sc config TPM start= demand

3. Close the command window and restart the computer.

The TPM service is using the tpm.sys file that is located in the %WinDir%\system32\drivers folder. If the file is corrupted or deleted, you can put it back in there.