Hey, i have installed zero hour from origin on every pc. Some are actually new os install, I than run genpatcher install patches with no problems, install gentools i than go along install the hd hud maps, and the online fix wether or not that helps. and only running maps with the RANK title according to some post some maps no good.
Some games we receive network disconnect which i think actually may be a network problem using a vpn over the internet so sometimes some people get mismatch and on ocassion some times we get seriours error crash.