Is it just one client or many?
Is this a task applied to the System Tree root or just to a group?
1. Assign a new tag to your client(s) and then reconfigure the task to exclude any clients with the new tag.
2. Delete the task
3. Move the computer to a group that doesn't have the task assigned to it.
It´s a task applied by tags. So I have to delete the actual task and execute other wake-up agent?
What's the task actually doing?
You could just add certain tags to the 'And has none of these tags:' section of the tag assignment and then an ASIC (agent wake-up)
The task was installing a wrong version of viruscan at a certain time, I just wanted it to cancel it so it would run.