I didn't running HB and WoW as administrator, coz I use windows xp, and I always turn off my antivirus when running gb/hb ..
after 3 hours update my windows,and succes, so i tried login my wow and HB, but still got same error, maybe i must try to using win 7 might be able to work .. >.<
It works also great under XP 32 and XP 64 bit I still have no need to change that. @TE try a fresh XP install maybee it helps