Question : How to release programs from UAC "Blocked Startup Programs" ?

Certain programs (Matrox Power Desk for Dualhead2go video extender) are being put into the Blocked Startup Programs in Windwos Defender.

How do I approve this program?  

Answer : How to release programs from UAC "Blocked Startup Programs" ?

You may use the Startup Unblocker tool to automate scheduled task creation (for the blocked startup program).

Fix for Windows has blocked some startup programs error in Windows Vista:
http://www.winhelponline.com/blog/fix-for-windows-has-blocked-some-startup-programs-error/

-or-

Try enabling the "elevate without prompting" Security Policy. Open secpol.msc (use the run command)
 
Open the security options from the local policies
Select User Account Control: Behavior of the elevation prompt for administrators in Admin Approval Mode.
Select Elevate without prompting.

Note that this lowers the system security.