Windows Image Acquisition (WIA) (StiSvc) Service Defaults in Windows 7

Provides image acquisition services for scanners and cameras.

Default Settings

Startup type: Manual
Display name:Windows Image Acquisition (WIA)
Service name:StiSvc
Service type:own
Error control:normal
Object:NT Authority\LocalService
Path:%SystemRoot%\system32\svchost.exe -k imgsvc
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\StiSvc
  • SeChangeNotifyPrivilege
  • SeCreateGlobalPrivilege
  • SeImpersonatePrivilege

Default Behavior

Windows Image Acquisition (WIA) is a Win32 service. In Windows 7 it won't be started if the user doesn't start it. When the Windows Image Acquisition (WIA) service is started, it is running as NT Authority\LocalService in its own process of svchost.exe. If Windows Image Acquisition (WIA) 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 StiSvc service is not running because of the error.


Windows Image Acquisition (WIA) is unable to start, if at least one of the following services is stopped or disabled:

Restore Default Startup Configuration of Windows Image Acquisition (WIA)

Before you begin doing this, make sure that all the services on which Windows Image Acquisition (WIA) depends are configured by default and function properly. See the list of dependencies above.

1. Run the Command Prompt as an administrator.

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

sc config StiSvc start= demand

3. Close the command window and restart the computer.

The StiSvc service is using the wiaservc.dll file that is located in the C:\Windows\System32 directory. If the file is removed or corrupted, read this article to restore its original version from Windows 7 installation media.