This is just to pass along a discovery I made where my Windows 7 computer was freezing up solid when logging on to Live Meeting.
The problem appears to have been in the AMD High Definition Audio driver. It looks like the first audio from Live Meeting (e.g., the Welcome sound) was hitting the driver which then hung.
By disabling the AMD High Definition Audio driver (it is the latest version), I was able to avoid the crash.
I'm not sure why I even have the AMD driver since there's a Realtek High Definition Audio controller that continues to work.
Hope this FYI helps someone down the road.
Ken