The Windows NT 3.5 AT command does not load applications interactively even
though the System Account Allow Service to Interact with Desktop check box
is selected for the Scheduler service. The AT command does load the
application in the background, but you are not able to see or interact with
the application in any way.
To load applications interactively with the AT command, use the
/INTERACTIVE parameter. For example, to run Notepad at 12:30pm, type the
following at the command line in Command Prompt:
at 12:30:00 /interactive notepad.exe
Microsoft has confirmed this to be a problem in Windows NT Workstation and
Windows NT Server version 3.5. We are researching this problem and will
post new information here in the Microsoft Knowledge Base as it becomes
Steps to Reproduce Problem
- From the Services portion of Control Panel, choose Schedule. The
Service dialog box appears for the Windows NT Scheduler service.
- Select Allow Service to Interact with Desktop and choose OK.
- Choose Start (make sure the status says Started).
- Exit Control Panel.
- Start Command Prompt and type the following (you may want to change the
at 12:30:00 notepad.exe
- Once the time you entered has passed, type AT at the command prompt to
see if the AT buffer is empty and the task was completed. Notepad is not
visible on the desktop.
- Load Process Viewer (from the Windows NT Resource Kit). You should see
Notepad running in the process window. However, you will not be able to
close out the background application using Process Viewer. You must
shutdown Windows NT and restart to clear the application from memory.