TPM Base Services (TBS) Defaults in Windows 7

Enables access to the Trusted Platform Module (TPM), which provides hardware-based cryptographic services to system components and applications. If this service is stopped or disabled, applications will be unable to use keys protected by the TPM.

Default Settings

Startup type:Manual
Display name:TPM Base Services
Service name:TBS
Service type:share
Error control:normal
Object:NT AUTHORITY\LocalService
Path:%SystemRoot%\System32\svchost.exe -k LocalServiceAndNoImpersonation
File:%SystemRoot%\System32\tbssvc.dll
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\TBS
Privileges:
  • SeChangeNotifyPrivilege
  • SeAuditPrivilege

Default Behavior

TPM Base Services is a Win32 service. In Windows 7 it won't be started if the user doesn't start it. When the TPM Base Services is started, it is running as NT AUTHORITY\LocalService in a shared process of svchost.exe. Other system components, such as drivers and services, may run in the same process. If TPM Base Services fails to start, Windows 7 attempts to write the failure details into Event Log. Then Windows 7 startup should proceed and the user should be notified that the TBS service is not running because of the error.

Restore Default Startup Configuration for TPM Base Services

1. Run the Command Prompt as an administrator.

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

sc config TBS start= demand

3. Close the command window and restart the computer.

The TBS service is using the tbssvc.dll file that is located in the %WinDir%\System32 folder. If the file is changed, damaged or deleted, you can restore its original version from Windows 7 installation media.