Error message 'The selected task "{0}" no longer exists. To see the current tasks, click Refresh’
A lot of customers complained the following:
When they open up the Task Scheduler, they get a message that says:
The selected task "{0}" no longer exists. To see the current tasks, click Refresh.
The mechamism task scheduler uses: it has a copy of tasks in registry and a copy of them in task files on disk. If somehow the tasked stored in registry and on disk are not in sync, users will encounter such issues as reported.
Tasks are stored in C:WindowsSystem32Tasks
In Registry, related branches are located in:
HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows NTCurrentVersionScheduleTaskCacheTasks
Tasks tree is stored in:
HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows NTCurrentVersionScheduleTaskCacheTreeMicrosoft
So the general troubleshooting steps are starting from checking these locations to see if anything is broken or inconsistent.
Reference: