WN3000RP internet access - some work some dont

router address (192.168.0.1) as the default gateway, and also - perhaps here's the issue - configures it's DNS to also be the gateway address and NOT the external DNS server addresses which the router has

normal

> Connected to the LAN by wire I can login to the WN3000 whose status shows all is well (connected to existing network at 54MBit/s, extender wireless on ch.11 at up to 54MBit/s)

if you have N router with extender it should have better than 54Mbps but that is not an issues

> My home printer is connected via a wireless access point which uses the extender network (_EXT). The printer works fine. Now the strange part. Some devices work fine, some don't; the Netgear WGPS606 (wireless printer server) works fine, my BlackBerry will happily connect to the _EXT network, and my wife's Macbook Pro will also connect to the _EXT network and she can access the internet in full.

These don't have firewall on devices that will cause issues or less to bring an issues

I have two Windows 7 laptops and these do not work at all. They can 'see' the _EXT network no problem, and to be sure I tested sitting 5 metres from the extender box so I have five bars of signal. But in the case of BOTH machines, when you connect to 'NIGHTMARE5_EXT', the same thing happens: i. Connection appears to take unusually long ii. The wifi icon in the taskbar shows the exclamation mark iii. 'Internet Access' is never granted iv. Eventually the Windows 7 networking defaults to "I can't find the internet" mode and allocates a special IP address of it's own (so I cannot even access the LAN).

if can not find internet connection then provide public ISP DNS server ip on wind7 tcp/ip properties setting and see how it goes