Note: This is not the question "How to disable startup items" because the simple answer is: "Use msconfig".

Now as for my question: I recently am very annoyed that some programs add startup items to my PC without my knowledge after installation, I always have 2 programs which startup - Temperature monitor and the Catalyst Control Center Tray.

Now, sometimes I install something and it adds startup entries, how can I make sure that no startup entries can be added to windows anymore?

So what I would like to do:

-Disable adding scheduled tasks (even for administrator accounts, so programs installing from them can't add startup entries too)

-Disable adding startup entries to the registry (even for administrators, would changing the permissions in HKLM on the Microsoft\Windows\CurrentVersion\Run to read only be enough?)

-Disable all other methods of startup in Windows 7 I don't know

-Set default startup of NEW installed services to "Start Manually" instead of/and block "Start Automaticly" and "Start Automaticly (Delayed)"

How can I accomplish this?

This is also a nice way to prevent most viruses fom running after machine reboot (if this can be accomplished).