so long story short, router stop giving out internet, went down to ogero to have it re-configured, guy gave me new pass and username for it... came home to change them to my liking.. entered the ip adress 192.168.1.1 but when prompted to enter the username: and password:(which is usually just type in admin (for both), it doesn't work, neither does user(for both)

the router is Tp-link, any ideas ?
10 days later
i read somewhere that i need to hard reset my router, i hope there is another way.. i realy dont want to go down to ogero yet again
If he gave you the PPPoE user/pass than the easiest way is to hard reset.
Other options for web GUI user/pass are:
admin/password admin/(empty) administrator/admin... Etc.