Game Freezes
If the game is freezing, as in you can’t move any more, then it’s likely some sort of local computer issue. Try running with the `-repair` option, and see if that helps. Also, of course, check to make sure you don’t have a DPS meter, gemfx, or reshade style thing getting in the way.
If it is just that skills don’t respond, but you can run around, it’s likely a network problem. Unfortunately, because the Internet is more like “all the roads in your city”, “is fine” is too simple: there can be a problem on one road, while others work just fine.
Here are some instructions for figuring out where, exactly, that network problem lies: pingplotter.com/fix-your-network
Once you know where the issue is, the next step is to talk to someone who can help — which might be anet, but it might also be your ISP, or (depressingly) a third party between you and anet, so … good luck!