Does this need to be done on-demand or on an interval? You could wrap a service that runs with elevated privelages or schedule a batch file in the task scheduler that runs as admin. If this needs to be done on-demand then it is another issue.

Also please explain what you're trying to do -- maybe it will help us come up with a better approach.

Hi ,
what I want to do is for a user to execute the script (assigning the task to someone else).
This needs to be done on demand

I'm sorry but you created three posts on this so I'm signing off of the thread until they are cleaned up. Posting the same question in two (or more, in your case) is a violation of the community rules.

Duplicate thread: http://www.daniweb.com/forums/thread221117.html