Starcraft 2 not updating
Ahead of the new release, SC: BW will be receiving its first official patch since January 21, 2009, and will contain bug fixes and added functionality The big news is that after the patch, SC: BW will become completely free, although it’s unclear just how popular the new bug fixes will prove to be.
The third and final episode of Star Craft 2: Nova Covert Ops has arrived alongside a new update for Legacy of the Void [official site].
Anyway, if you’ve tried all of the above and still can’t get it to work - I found a fix that works for me.
I launched IE (which I rarely use, as I use Chrome or Safari) and found that it was set to ‘Work Offline’.
If you are having lag in game menus, try running Starcraft 2 as administrator.