InfoPath Dev

I've been given a.xsn file by a colleague and when I try to open it I get an error.  When I view the details I get this "The form template is trying to access files and settings on your computer. InfoPath cannot grant access to these files and settings because the form template is not fully trusted. For a form to run with full trust, it must be installed or digitally signed with a certificate."

 Can someone please let me know I I can install this template?

 Thanks...

 JohnnyC313

You need to open it in design mode.

Right-click and select design rather than open.

Then you can save your own copy.  Probably might want to change the security level until you are ready to set it back to full trust if neccessary.