I would just download the BIOS to a flash drive and update through the BIOS itself.
As for EZ update, it could be having issues reaching the server or maybe something else is going on. Are you on any kind of restricted network? Do you have the latest version from the b350 support page?
A bus station is where a bus stops. A train station is where a train stops. On my desk, I have a work station…
My computer is connected to a router via Ethernet cable. Everything related to the Internet works fine on this computer. No, I did not have the latest version of BIOS from the b350 support page. I downloaded the latest yesterday and installed it with a USB drive, but I would still love to see EZ Update working.