Can't connect to my modem by ethernet

[ivikop]

Hi all

I'm having a very annoying issue which came out of nowhere. I'm connected to my modem by ethernet with my laptop, and all of a sudden today when I came home, everything looked normal, all the lights were flashing, the ethernet sends and receives packets, but can't connect to anything related to internet (skype,browsers,etc...). I had a few issues with their internet providers when a couple of times the router said this configuration does not have a valid IP but since then it was fixed. Now everything looks normal except the fact that I don't have any access to internet.

When I run the troubleshooter, it doesn't find anything.
Could anyone help me? I'm desperate

 

[Preecher]

Have you rebooted both your laptop and modem?

 

[ivikop]

Rebooted the modem several times (took off the electricity, waited, reconnected, nothing)
Restarted the laptop just now, still nothing.

I am currently connected to the public wifi, in case you are wondering how come I am typing these.