Disable IPV6

1. Un-check the IPv6 box in the Network Properties
2. Go to regedit and add the following key:
Windows Registry Editor Version 5.00

Flush DNS on Windows Client from CMD pront

ipconfig /flushdns

Enable Ping from from CMD promt

netsh firewall set icmpsetting 8

DNS CNAME or A Record?

Good explanation of the difference - they're confused frequently at my POB