Howtogeek posted a tutorial about enabling Ping Echo Replies in Windows 8
When you ping a PC running Windows 8, by default it doesn't reply to the echo request. This is caused by a firewall rule that blocks all incoming ICMP packets, but this can be changed quickly in the Advanced Firewall Settings instead of disabling the entire firewall.How to Enable Ping Echo Replies in Windows 8
When you first ping a Windows 8 PC you might get a result like this.