I don't know what's up. I play dozens of games online including many other Blizzard games.
This is what happens: I connect to Battle.net in StarCraft II. It lasts a few seconds. Then it says it lost the connection to B.net and tries to get it back.
When I exit out my whole internet connection is down. I can't visit sites or anything.
After experimenting I've discovered this ONLY happens and 100% of the time when I log into battle.net from StarCraft II. This game somehow manages to kill my internet connection when I log into it. It kills it for itself and for everything else. It doesn't fix until it stops being logged in or stops trying to relog automatically.
They want to make talking to them as hard as possible.
I can't log into any tech support forums for some reason. It won't let me post in them.
Their email replies are wholly useless. They're slow, clumsy and never help. I need to talk to someone face to face but when I go onto the tech support for my other games where this is possible they say they can't help and to go to SCII's incredibly unhelpful tech support which I can't talk to a real person at.
It could be your connection isn't strong enough. If you put too much strain on a weak connection, it collapses. Same thing happened with Champions Online for me. I bought a better router and reciever and performance improved astronomically.