precise symptoms of failure ?
I think I had this problem 5 days ago : my wifi gave only a "limited connexion" : was seeing the wifi networks but unable to connect.
Runing the "ipconfig " command showed an ipv4 address 169.254.xxx.
I tried a lot of solutions found on internet :
Restarting the pc was of no help.
I think that deactivating the wifi connexion, reactivating it and powering off the machine fixed the problem at next power on (ip address 192.168....). Problem did not reappear.