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 of 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 C:\Windows\system32\drivers directory. If the file is removed or corrupted, read this article to restore its original version from Windows 8 installation media.