Reset windows network state

Reset WINSOCK entries to installation defaults : netsh winsock reset catalog (change static ip to dhcp)
Reset TCP/IP stack to installation defaults : netsh int ip reset reset.log
Flush DNS resolver cache : ipconfig /flushdns 
Renew DNS client registration and refresh DHCP leases : ipconfig /registerdns 
Flush routing table : route /f (reboot required)