Vista - Vista 32, SP2 - scheduler - corrupted tasks

Since the WU installed Vista SP2, two scheduled tasks are declared corrupted when launching the Scheduler :
User_Feed_Sychronisation
Scheduled scanning task

I've been trying to locate them in the scheduler, even displaying the masked tasks, but to no avail. Where can I locate them ?
BEst regards

Vista Task Scheduler task image is corrup

the Scheduled scanning task is probably from your antivirus software try to diable it and create a new one

try it out and post the results

THanks, but the system displays none of both tasks in the center panel. When I click on display hidden task and then refresh, it displays the message indicating the User_Feed_Sychronisation Scheduled scanning task The task image is corrupt or has been tampered with. i tried to delete with schtasks /delete ... to no avail, but your comment made me look into the registry where the tasks could be found - and deleted (after backup). I've reenabled the ms feed. Let's see,at least the task scheduler is not giving the message again. As i had problems with scheduled taks i hope this will be the solution. Regards and thanks for the help