Stopping apps from adding Scheduled Tasks?

Question

I'm getting tired of opening the Task Scheduler and finding a dozen tasks added by various programs larding up my computer. Install Flash and suddenly there's a new task to check for updates. Ditto for just about every other downloaded app.
Is there a way to prevent software from adding Scheduled Tasks on their own without completely disabling the Task Scheduler?
It certainly seems like a nasty security hole deliberately left open by Microsoft that could be easily abused, and should be plugged in future versions of Windows. At the very least, Task Scheduler should WARN me when an app requests permission to add a
scheduled task.
For now, I'd be satisfied with a .Reg file to disable/enable the ability to add Scheduled Tasks that I can run when needed.
Anyone? TIA.

Answer 1

Clever idea, but sadly, doesn't work. :(
It does work!
I used this command from an elevated command prompt:
cacls.exe c:\windows\system32\tasks /t /g everyone:R
To reverse the process you would use this command:
cacls.exe c:\windows\system32\tasks /t /g Everyone:r System:F Administrators:F
To allow tasks in the Microsoft folder to be created or modified, use this command as the last command:
cacls.exe c:\windows\system32\tasks\Microsoft /t /g Everyone:r System:F Administrators:F