Application That Requires Schedule Service Fails

Programs that require the use of the Schedule service (Atsvc.exe) provided with Windows NT may fail when you run them on a Windows NT system for which you have also installed Task Scheduler (a Microsoft Internet Explorer 4.0 optional component). You will see inconsistent results when attempting to start a program using the AT commands. An example of such a program is Soon.exe from the Windows NT Resource Kit.

When you install Task Scheduler on Windows NT, it replaces the Schedule service. The Schedule service no longer shows up in the Services utility in Control Panel.

To resolve this problem, do one of the following:

• Use a different program that is compatible with the Internet Explorer 4.0 Task Scheduler.
  
  -or-
• Remove Task Scheduler by using the Add/Remove Programs tool in Control Panel by selecting "Task Scheduler v1.0 (remove only)" from the Install/Uninstall tab and clicking Add/Remove.
  NOTE: The Add\Remove tool may not show the Task Scheduler v1.0 service.

If the Microsoft Task Scheduler is not automatically removed, the services portion of the registry can be manually modified as indicated below.

WARNING: Using Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.

For information about how to edit the registry, view the "Changing Keys And Values" Help topic in Registry Editor (Regedit.exe) or the "Add and Delete Information in the Registry" and "Edit Registry Data" Help topics in Regedt32.exe. Note that you should back up the registry before you edit it. If you are running Windows NT, you should also update your Emergency Repair Disk (ERD).

1. Start Registry Editor.
2. Change the registry entries for Internet Explorer 4.0 Task Scheduler service:
   

         Key Name:
         HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Schedule
   
         Value Names:
         DependOnGroup: REG_MULTI_SZ
         DependOnService: REG_MULTI_SZ: RpcSs
         DisplayName: REG_SZ: Task Scheduler
         ErrorControl: REG_DWORD: 0x1
         Group: REG_SZ:
         ImagePath: REG_EXPAND_SZ: C:\WINNT\System32\MSTask.exe
         ObjectName: REG_SZ: LocalSystem
         Start: REG_DWORD: 0x3
         Type: REG_DWORD: 0x120
   						

   
   to the following registry entries for Windows NT AT Schedule Service
   

         Key Name:
         HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Schedule
   
         Value Names:
         ErrorControl:REG_DWORD: 0x1
         ImagePath: REG_EXPAND_SZ: %SystemRoot%\System32\AtSvc.Exe
         ObjectName: REG_SZ: LocalSystem
         Start: REG_DWORD: 0x2
         Type: REG_DWORD: 0x10