Windows Vista Services

Terminal Device Driver - Windows Vista Service

Terminal Server Driver by Microsoft Corporation.

This service also exists in Windows 7 and XP.

Startup Type

Windows Vista edition without SP SP1 SP2
Starter System System System
Home Basic System System System
Home Premium System System System
Business System System System
Ultimate System System System

Default Properties

Display name:Terminal Device Driver
Service name:TermDD
Error control:normal

Default Behavior

The Terminal Device Driver service is a kernel mode driver. If Terminal Device Driver fails to start, the error is recorded into the Event Log. Windows Vista startup proceeds, but a message box is displayed informing you that the TermDD service has failed to start. At least one service depends on Terminal Device Driver. Therefore I do not recommend you to disable it.


If Terminal Device Driver is stopped, the Terminal Services fails to start and initialize.

Restore Default Startup Type of Terminal Device Driver

Automated Restore

1. Select your Windows Vista edition and Service Pack, and then click on the Download button below.

2. Save the RestoreTerminalDeviceDriverWindowsVista.bat file to any folder on your hard drive.

3. Right-click the downloaded batch file and select Run as administrator.

4. Restart the computer to save changes.

Note. Make sure that the termdd.sys file exists in the %WinDir%\system32\DRIVERS folder. If this file is missing you can try to restore it from your Windows Vista installation media.

Yea, though I walk through the valley of the shadow of death, I will fear no evil: for thou art with me; thy rod and thy staff they comfort me.