Task Scheduler.

Every time I open Task Scheduler I see a dialogue box that I can't figure out. :confused Any advice will be appreciated.

 

I would suspect that a program or feature that once had a scheduled task has since been uninstalled or is no longer functional. Lord knows how you stop it though.

 

https://answers.microsoft.com/en-us...r-exists/01e60fa1-8004-40b4-9cf0-247fb80edb56

Startpage.com first result when keyed "The selected task "{0}" no longer exists".

 

Thanks Bugballou. I just saw this. Seems I need to fix my own task scheduler. :-o
As per the second suggestion, I turned off Scheduled Defragmentation, turned it on again, and the problem is fixed.