Edited by Gnosis#1870 on 5/14/12 10:07 AM (PDT)
My battle.net folder was in c:/documents and settings/all users/application data <-- which is a hidden file btw so you'll need to click tools > folder options... > view tab and check show hidden files and folders.
Deleted Battle.net folder
opened blizzard entertainment > battle.net deleted cache folder
then ran it again and it became unstuck during open beta
Edit - It's a problem with agent.exe, so you delete battle.net folder to replace it.
I'm trying to find my "Tools" on a Window's XP with no luck... I've also tried turning off my firewall and of course my exceptions are enabled.. Nothing is working for me. Will someone help me out?