I had this same problem using my MSi GT70 laptop. The problem seemed to be with the wireless adapter. Turn off your wireless and connect with an ethernet cord and it should work fine.
I also have a GT70 and had the same problem. The problem seems to be with the wireless adapter. I turned off my wireless and connected with an ethernet cord and my client no longer froze entering a lobby. Hope it helps.
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in DayZ Mod Troubleshooting
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I had this same problem using my MSi GT70 laptop. The problem seemed to be with the wireless adapter. Turn off your wireless and connect with an ethernet cord and it should work fine.