I have this as well. Win7. Either something from a debug build which calls an otherwise forbidden API that isn't supported snuck into the production build or... there is zero testing on this supported platform as it doesn't even hit splash screen. I REALLY hope it's the former and we get a fast patch. After the hype of the - admittedly fantastic - Witch Queen reveal, I was almost ready to order the Collector's Edition. Now everything is deferred. I refuse to 'upgrade' to spyware in Windows versions above 7 and cede control equivalent to ownership of MY computer to Microsoft. I am a longstanding PC customer and either I play on Windows 7, you release the Linux build, or I walk away from the franchise. After >3000 hours in D2, this would be painful, but I won't compromise. "Hey y'all you need to update your OS" would not be an acceptable answer, especially (as others have pointed out) given D2 Beyond Light is marketed as specifically supported on Win7 and we've paid for it, as well as this Season's content. Fingers crossed for a very swift resolution.