Hi, I am using Windows Server 2003. All schdule tasks failed with "last result" as 0x80. what could be the reason for this failure.

take a look at http://support.microsoft.com/kb/843280/en-us. is this issue happening at your machine?

Try the following steps. Please remember backup the registry key before modify: 1. At a command prompt, type REGEDT32.EXE to start Registry Editor. 2. In Registry Editor, locate the following registry key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\SubSystems 3. In the right pane of Registry Editor, click Windows. 4. On the Edit menu, click Modify. 5. In the Edit String dialog box, locate the SharedSection parameter string in the Value data box, and then specify a larger value for the SharedSection parameter. Note: The SharedSection parameter specifies the system and desktop by using the following format, where <xxxx> defines the maximum size of the system-wide heap (in kilobytes), <yyyy> defines the size of the per desktop heap, and <zzzz> is the size of the desktop heap for each desktop that is associated with a non-interactive Windows station: SharedSection=<1024>,<3072>,<3072> 6. Click OK. The 3rd parameter should be ideally increased in increments of 512 till the issue is resolved. If issue still exists after reboot, please go to Event Viewer to see if there is any specific errors related. If so, please copy them and post back to here. Shaon Shan| TechNet Subscriber Support in forum| If you have any feedback on our support, please contact tngfb@microsoft.com

I restarted the server and the problem is solved :)