One point: most of these wireless routers are set up to use the 192.168.1.x range, IIRC.
The problem then is that all your neighbours' routers are trying to be DHCP servers on the same subnet, which confuses the heck out of the network kit.
Try configuring your router to use another value between 2 and 254 in the next-to-last place - for example, 192.168.153.x, where the "153"can be anything you like between 2 and 254. The router config will almost certainly be on
http://192.168.1.1/ or
http://192.168.0.1 - TBH it's so long since I had one with the factory defaults that I can't remember what they are
Important point: do this from a machine with a wired Ethernet connection to the router, otherwise you'll have disconnected yourself from the wireless connection when the router switches to the new subnet - I did this once and had to
get up off the couch and step over to the desk where the wired machine was, literally
two paces away, to finish up. You don't
need that kind of pain in your life
Additional important point: If you're using Windows (as you probably are, in which case please accept my commiserations) then you should be able to get away with using a wireless connection to do this if, after changing the router to use a different subnet, you open a command line (Start menu -> Run... -> type "cmd" and hit "OK") then type (IIRC) "ipconfig /renew" then hit return/enter/wotever it's called these days.