Studio 1558 using Windows 7 64-bit with Netgear DGN1000 router
I can access almost every website with no problem however two sites in particular time out unless I connect an ethernet cable between the laptop and the router. Then there is no problem, the site comes up immediately. The sites are skytv.co.nz and asbbank.co.nz.
I have tried different browsers but that does not make any difference. I borrowed a Toshiba laptop and connected to my wireless network and that had no problem connecting to either site wirelessly so there must be something wrong in my Dell laptop. One difference I noticed between the Toshiba and Dell laptops was in Wireless Network Connection Status the Connection Speed for the Dell is 65.0 Mbps whereas the Toshiba was 150.0 Mbps. I'm not sure what this means and whether it is relevant.
I have reduced the wireless MTU to 1400 from 1500 but still no connection on those sites. It is a nuisance to have to use the ethernet cable to visit two websites when the wireless works fine on every other site.
What could cause this?