hostile

Good day. I have downloaded the main exe. for ra2 from xwis, but cannot play properly. From what i've been seeing from youtube, looks like i need some files to transfer in the prog files x86 thing, but that's for those who got the game from "origin" or something. What should i do? Also, can i buy the ultimate collection on amazon or do i absolutely need to buy it from origin to get the origin files?