It's highly unlikely it's the card, or it would most likely either a) show disconnected or b) would
never have worked (and it seems it sometimes does), as opposed to having worked then broke, though it "changing" to say it was connected at 100Mbps is odd - what was it at before?
As I said, the problem with finding suggestions is that it's so bloody hard to work out what's been tried and what hasn't in this thread because of the amount of sheer drivel. Best idea would be a) lay out what's been tried in a list of points or b) start from the beginning, because we're getting nowhere fast here.
the ip he is getting is either when he hasnt got a dhcp or there wasnt a dhcp and now there is, its remain in in order for us to loss the appipa ip too do the steps we did.
That bit doesn't make sense, since you've been through ipconfig /renew millions of times, and the router's apparently set with a working DHCP server, and still nothing's changing.
Does the USB have a manually configured IP? Tried the wired/wireless with another device (and set to obtain IP, subnet mask et al from DHCP) and seen if it worked?
It is connecting but once again with no internet or router settings.
To what extent - it says "Connected", but either a) setting IP manually (as described above) or b) setting the interface to get an IP automatically both yield nothing?