TCP_ADDRNOTAVAIL

[rajkosto]

TCP_ADDRNOTAVAIL means you ran out of source ports
because windows only uses 1025-5000 as ephemeral ports, and you may be on a many-user NAT performed by your carrier, it could be that all the source ports for new connections have been used up.
you can try increasing the ephemeral port range if you dont plan to (or have the ability to) host any services on that machine (which is usually the case with carrier NAT). or you can just complain to your ISP why they are using carrier NAT in the first place (the minimum non-asshole ipv4 assignment is a single /32 globally routable ip per customer)
if its not ephemeral port exhaustion, then you justhave a firewall somewhere blocking outgoing connections to port 11000 tcp or 10000 tcpudp