by boco » 24.09.2015, 22:15
ICMP is the protocol used by Ping, for example. Your problems rather seems to be with DNS resolution. Manually entering the IPs for the server could be a workaround (they rarely change).
Microsoft update catalog: http://catalog.update.microsoft.com/v7/site/
Windows Install media download: https://support.microsoft.com/en-us/help/15088/windows-create-installation-media