IPv4 Autoconfiguration problem

> My Vista Premium computer has decided that my home network is now an
> unknown network. I received some help from another usenet group and
> they explained I should post the results from an ipconfig /all. I did
> and my computer came back with169.254.xxx.xxx when it should only have
> one of the generic 192.168.1.x addresses. One of the gentlemen from
> the group was helping me, but has since gone M.I.A. He explanied that
> the problem was the "Autoconfiguration IPv4 Address 169.254.xxx.xxx".
> He asked me to try and disable IPv4 and IPv6, but doing that and also
> trying to disable both didn't work.
>
> I have a Netgear wgr614v6 router that is fully functional and in fact
> I am typing this on my PS3 connected through the same router that
> Vista says the internet doesn't work on. I get the "Local-only"
> message, but if I try to connect to the router page 192.168.1.1, that
> doesn't work either. It's as if Vista thinks I am connected to the
> router, but it's not.
>
> Very weird and any suggestions would be greatly appreciated.
>
> Thanks in advance.