Thanks for all the suggestions. The Netgear 600 dual band router installed only 3 weeks ago worked fine on all machine - it seemed to have the newer WPA2 security settings and that router was set to a WPA+ WPA2 security mode. This Dlink DIR-655 does not seem to have the WPA2 security setting?
Here is some info to your Q's in BOLD
What HW version is your router? B1
What FW version is currently loaded? 2.00NA - did check for firmware updates and this is most recent v
What ISP Service do you have? Cable or DSL? - COMCAST CABLE
What ISP Modem do you have? Stand Alone or built in router? BUILT IN ROUTER
What ISP Modem make and model do you have? MOTOROLA SURFBOARD 5100
Ensure DNS IP addresses are being filled in under Setup/Internet/Manual? HAVE TO CHECK
Turn off QoS options. WILL TRY
Turn off Advanced DNS Services if you have this option. WAS TURNED OFF
Turn on DNS Relay under Setup/Networking. WILL TRY
Setup DHCP reserved IP addresses for all devices on the router. THIS IS INTERESTING, isn't this handled by AUTO obtain IP address?
Ensure devices are set to auto obtain an IP address. YES
Set Firewall settings to Endpoint Independent for TCP and UDP. WILL TRY
What wireless modes are you using? MIXED G&N (have an older adapter in win XP PC)
Try single mode G or mixed G and N?
What security mode are you using? WEP, WPA or WPA2? Preferred is WPA2. Auto TPIK and AES. - DOES NOT OFFER WPA2 only WPA