Issue:
This kind of issue is basically related to Task Scheduler, Normally you observe that the Tasks are not running as scheduled, when you try to check the properties of task, you get this error.
When you click “Ok”, you get the Properties of the task, but nothing works even though you make the changes.
Note: Backup all the information related to Logon Credentials used to run the specified tasks.
Resolution:
You need to clear the folder “S-1-5-18”
You can find the folder in the below location:
“C:\Documents and Settings\All Users\Application Data\Microsoft\Crypto\RSA”
Once you have deleted the folder, you can go back to Tasks and open the task properties, this time you won’t get the error.
Make sure to re-enter the logon credentials used to run the tasks.