Quiet easy.
First of all disable IPV6:
1.) Open a terminal and type: sudo gedit /etc/sysctl.conf
2.) Add the following line at the end: net.ipv6.conf.all.disable_ipv6=1
3.) Save the file and close gedit
Now blacklist certain drivers which are messing up.
4.) Again in the terminal: sudo gedit /etc/modprobe.d/blacklist.conf
5.) Add these lines: blacklist rt2800lib
blacklist rt2800usb
blacklist rt2x00lib
blacklist rt2x00usb
6.) Save and close gedit and the terminal
7.) Maybe reboot and it should work like a charm.