Microsoft KB Archive/172080

= System Agent Does Not Function After Uninstalling Task Scheduler =

Article ID: 172080

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Internet Explorer 1.0
 * Microsoft Internet Explorer 2.0
 * Microsoft Internet Explorer 3.0
 * Microsoft Internet Explorer 3.01
 * Microsoft Internet Explorer 3.02
 * Microsoft Internet Explorer 4.0 128-Bit Edition
 * Microsoft Internet Explorer 4.01 128-Bit Edition
 * Microsoft Internet Explorer 5.0
 * Microsoft Internet Explorer 5.01
 * Microsoft Internet Explorer 5.5
 * Microsoft Internet Explorer 3.2
 * Microsoft Internet Explorer 4.0 128-Bit Edition

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This article was previously published under Q172080



SYMPTOMS
After you uninstall Task Scheduler, the System Agent icon does not appear on the taskbar. If you attempt to start System Agent by using the Start menu, you may receive the following error message:

Cannot restart System Agent, reinstall MS Plus

In addition, when you start Windows 95, you may receive the following error message:

Essential file is missing on bootup

Sage.vxd



CAUSE
This behavior can occur if you uninstall Task Scheduler. Task Scheduler replaces System Agent, but System Agent is not restored when you uninstall Task Scheduler.



RESOLUTION
To resolve this issue, reinstall System Agent. For information about reinstalling System Agent, please see the following article in the Microsoft Knowledge Base:

133191 Reinstalling System Agent Without Losing Scheduled Tasks



MORE INFORMATION
Task Scheduler is an Internet Explorer component that you can install using the Add/Remove Programs tool in Control Panel after Internet Explorer is installed.

For information about how to add or remove Internet Explorer components, see the following article in the Microsoft Knowledge Base:

171229 How to Add and Remove Internet Explorer Components

Additional query words: 4.00 sage systray system tray

Keywords: kberrmsg KB172080

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