I just had the exact same problem and after some trial and error I found out that Riva Tuner for MSI Afterburner caused the crashes for me on startup. It worked perfectly fine after I disabled Riva Tuner.

I tried number 3 in 0.45 and it worked perfectly fine for me. After having continuesly pressed the refresh butten for about a minute I was still able to speak to my companions over teamspeak without any problems. I used 10000 as value for the regkey.