Why can't I ping other computers on network?

[sarta]

I set up 3 computers on a linksys wireless router (two wireless and one hardwired). Two of them are a client's computers and one of them is mine. All computers have internet access via DHCP (addresses 192.168.1.100 etc) however from my computer, I am unable to ping the other 2 computers, whereas the other computers are able to ping mine. All computers have the windows firewall turned off.

What could be configured differently about those computers that they can't be pinged?

 

[bilbonvidia]

Are they all in the same workgroup?

 

[IRudebwoy]

Are they all in the same workgroup?

Whaaa?


Can you ping the router/gateway from the PC's?

Is your computer hardwired?

Please verify the firewalls are turned off.

 

[brianinms]

Could they have some sort of antivirus that has a built in firewall?