Your current security settings do not allow this action

Hi, i am having a Windows Vista running desktop. I received a mail with a video clip which i am trying to play in Adobe PDF. But whenever i try to do the same, it gives me an error message saying "Your current security settings do not allow this action."

I have no idea about this error but i guess it is generated from Windows Media Player. Can anyone please provide me some information about this error and how can i fix it?

Many Thanks,.

Probably this could be related to Adobe itself. Which version of Adobe PDF are you using? You should try out uninstalling it completely from the system and download the most recent version of Adobe. That may fix the problem.