Sorry mate I've already said I had wireless issues with my lads one that runs on N router tech!
I've part solved my issues by ordering a longer router coaxl cable and sticking it in the hall way
Mohamed comes to hill instead of hill goes to Mohamed

In the settings there is a 5GHz setting you might want to try that and fixing a channel most Wireless old thech uses 2GHz so if you get a dongle make sure it uses 5Ghz to improve signal!
As for my useless information on my last post suck on eggs!

If all else fails stick a coat hanger into the back of it