okay, to go deeper into the problem:
I have hit the speeds I should have using this exact setup before I reinstalled windows and laid the cable in a proper way (normally when I really had to use it I just put it over the floor).
also, when i check the properties of the connection it says that there is no ipv6 connection, but if I recall correctly there was before, could this be part of the problem?
my upload speed is also extremely low, 2 Mb/s.
thanks