We're not currently looking into Windows 7 support during the beta. If you have Windows 7, I suggest that you upgrade to Windows 10. If you could run 2012v1, then that means your computer can probably run Windows 10.
Upgrading to Windows 10 is literally free if you have Windows 7 or 8/8.1. Just use Microsoft's upgrade tool.
btw we're aiming for the servers to be back up tonight