Application That Requires Schedule Service Fails

This article was previously published under Q196731
This article has been archived. It is offered "as is" and will no longer be updated.
IMPORTANT: This article contains information about editing the registry.Before you edit the registry, make sure you understand how to restore it ifa problem occurs. For information on how to do this, view the "Restoringthe Registry" online Help topic in Regedit.exe or the "Restoring a RegistryKey" online Help topic in Regedt32.exe.
Programs that require the use of the Schedule service (Atsvc.exe) providedwith Windows NT may fail when you run them on a Windows NT system for whichyou have also installed Task Scheduler (a Microsoft Internet Explorer 4.0optional component). You will see inconsistent results when attempting tostart a program using the AT commands. An example of such a program isSoon.exe from the Windows NT Resource Kit.
When you install Task Scheduler on Windows NT, it replaces the Scheduleservice. The Schedule service no longer shows up in the Services utility inControl 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.

  • 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.
More information
If the Microsoft Task Scheduler is not automatically removed, the servicesportion of the registry can be manually modified as indicated below.

WARNING: Using Registry Editor incorrectly can cause serious problems thatmay require you to reinstall your operating system. Microsoft cannotguarantee that problems resulting from the incorrect use of Registry Editorcan be solved. Use Registry Editor at your own risk.

For information about how to edit the registry, view the "Changing Keys AndValues" Help topic in Registry Editor (Regedit.exe) or the "Add and DeleteInformation in the Registry" and "Edit Registry Data" Help topics inRegedt32.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 RepairDisk (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
winat schedule at scheduler that no longer functions task replaced

Article ID: 196731 - Last Review: 10/26/2013 04:13:00 - Revision: 2.0

  • Microsoft Windows NT Server 4.0 Standard Edition
  • Microsoft Windows NT Workstation 4.0 Developer Edition
  • kbnosurvey kbarchive kbprb KB196731