I'm getting an error in the launcher that _gat is undefined. I tried the tips recommended in the other thread (deleting cookies and temporary internet files, updating IE) and it's still happening. The errors keep happening even if I answer "no" to the question about continuing to run scripts. I remember these problems from back at launch, I'm kinda surprised they are still happening.
It could be that another application is blocking the launcher from loading properly. Security software like software firewalls, adware blockers, antivirus, anything related to desktop cyber security might be causing this. If you have any of those, you can try turning them off.