help with downloading games

i am unable to download and play games for the free trials becuase it wants me to open with hips email attachements witch isnt an applacation file its an ewf file and will not run or play after downloading and all the games i click on in the download section wants me to open with this what do i do?

Welcome to the pond!!
Contact customer services. They can tell you what it is and what to do.
I looked it up and this is what I found out.
http://pcsupport.about.com/od/fileextensions/f/ewffile.htm