hey i got same problem as this guy.... I start HB up...it loads up WoW as usual....BUT it goes directly to the honorbuddy ingame window..it never has that box where you have to put your code in it. And does nothing. Only thing that works on it is the buddy store...JUST like he said is happening to him.
download and install this. http://download.microsoft.com/download/2/E/6/2E61CFA4-993B-4DD4-91DA-3737CD5CD6E3/vcredist_x86.exe after your done restart your pc.