Q:

Autostart application/process

How is it possible to auto start my application or run a process when the user turns on the phone. 
If you look at ex.  Outlook WP7 included in the operating system then updates the icon so that you can see that there are new mail.  This is a process in the background running.  
But I've read a bit about this now, but can not find out that this is possible using the SDK from Microsoft?  
Is it not possible??  If possible, how does one do that? 
Notice: I do not want any solution that involves jailbreak. 

A:

No, it is not possible for 3rd party developers to run application in the background as well as startup for Windows Phone 7.0. 
What you can do is update the Tile(icon) using Push Notification. 
UDPATE:
WP7 7.5 (Mango) has Background Agent to mimic most of the behavior of background processing.