Someone said their friend had the same problem. Were those Vortex2 drivers the latest ones from http://www.aureal.com/newa3d/download/drivers.asp?which=Vortex2? I wonder if a previous version didn't have problems.
Also, for those who don't have the problem, did you remove all those files and rename the .cab file like it asked? I tried to follow the setup steps exactly, but maybe I missed something, or could have avoided a step that someone else did.
By the way, who makes the posts that describe problems on the main page about hardware or applications? I'd like to email the guy that posted and said he was locking up too.