Sony Playstation 3 (PS3) Console "change password belkin n150 router" Questions

...Belkin router. Log into the router(192.168.2.1), and look under System Settings for the UPnP function and disable it. If you haven't changed the password on the router, the default password is blank, ...

...model F9K1001v1 router and cant get hooked up on internet, it keeps giving me the error code 51031 How do I change the password currently is oLqU7@n;(FF!4JAb"<yc9@) to something shorter and