Cannot connect to networks after fastboot

I had dualboot Windows 8 and Ubuntu 14.04.. I wanted to install also Windows 7, so i tried resizing Windows 8, and i had a couple of errors but in the end i managed to do it..

Anyways the problem started from the moment i resized the partitions..
But even after a complete format of my computer, i still have this problem..

It finds the networks, but it says "Connecting takes more than usual" and in the end it won't connect.

Anyone?