Keep in mind! Capcoms Street fighter 4 and Street fighter X Tekken both use Games for windows live, a service that is expecting to end very soon, and capcom has not replied once to any queries on if they plan to patch either of these games. Without a patch the games are dead in the water (Single play may be effected too) once that day comes. Things go from bad to worse when you consider the current patches require updates to be downloaded from the service, and that download will not exhist.
That said there are cracks for the games as well as a download packs that contains 3 GWFL packages needed for the current patch to run, and you just use an offline profile.
With the announcement of a new SF4, it sounds like capcom has no interest in pushing updates so it can generate more sales on the new version.