Possible Fix. my wife got the beta and was having problems installing the beta on windows 7 64. we kept getting this error over and over.
click on start in the command window type %programdata%
Delete the folder Battle.net and Blizzard Entertainment
Run the Installer.
follow normal install operations until it crashes.
dont close the crash log.
((((THIS IS AN EXAMPLE LOG)))) (scroll down till you see my bold text)
Blizzard Launcher.exe: (build 1364)
--- Thread ID: 4692 [Current Thread] ---
07AC23A0 0018DA28 0003:000003A0 C:\Program Files (x86)\Panda Security\Panda Global Protection 2012\ssleay32.dll <---- THIS THREAD IS WHERE YOUR PROBLEM IS. Reguardless of what program it says is installed here.. this is the program causing you issues. this example has panda global protection 2012, mine was VodBurner. what ever program you have installed that this line points to. disable or uninstall it (rename folder?) follow step 1 again, then install again. if your still crashing please post only this part of your log (up to kernelbase.dll)