Event ID 7000 and "%1 Is Not a Valid Win32 Application" Error Message When You Start a Service


One or more of the services that are installed on your computer do not start, and one of the following issues occurs:
  • You receive the following error message:
    Error 193: %1 is not a valid Win32 application.
  • The following event is logged in the System event log for each service that does not start:


This issue may occur if the path of the executable file for the service contains spaces.

When Windows starts a service, it parses the path of the service from left to right. If both of the following conditions are true, Windows may locate and try to run the file or folder before it locates and runs the executable file for the service:
  • The path of a service’s executable file contains spaces.
  • There is a file or folder on your computer’s hard disk that has the same name as a file or folder in the path to the service's executable file.
For example, if the path of the executable file for a service is C:\Program Files\MyProgram\MyService.exe, and if a folder that is named C:\Program also exists on your hard disk, Windows locates the C:\Program folder on your hard disk before the C:\Program Files\MyProgram\My Service.exe file, and then tries to run it.


Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756 How to back up and restore the registry in Windows

To resolve this issue, add quotation marks around the following entry in the Windows registry, where <ServiceName> is the name of the service:
The ImagePath entry contains the path of the executable file for the service. To add quotation marks around the ImagePath entry for a service:
  1. Click Start, and then click
  2. In the Open box, type
    regedit, and then click OK.
  3. Locate, and then click the following registry entry, where <ServiceName> is the name of the service:
    For example, if the service is named MyService, locate the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MyService key.
  4. In the right pane, double-click ImagePath.
  5. In the Value data box, add quotation marks around the complete path of the executable file for the service.

    For example, if the path of the MyService service is C:\Program Files\MyProgram\MyService.exe, change the entry in the Value data
    box for the MyService service to the following
    "C:\Program Files\MyProgram\MyService.exe"
  6. Click OK, and then quit Registry Editor.

Article ID: 812486 - Last Review: Mar 15, 2008 - Revision: 1