Works on one computer, not the other

[stach]

Hi everyone, first time posting here.

I just moved so I changed my internet provider.

My setup is as follows:

- A Sagemcom 2864 modem with an Asus RT-N16 router running Tomato.

- Both computers running 3.3.1

- Both have NOD32 antivirus with an exception for uTorrent

- Laptop running windows 7 connected via wifi and desktop running windows 8 with a wired connection

The laptop gets 700kBps while the desktop gets between 0 and 0.5 for the exact same torrent.

Every now and then the desktop connection spikes a little bit (to like 150kBps), but quickly goes back to essentially 0.

On the desktop DC++ won't fully run either, still downloads some stuff but can't get to active mode. Says port forwarding didn't work. I tried to manually port forward DC++ and utorrent in Tomato, but it doesn't seem like DC++ and utorrent acknowledge that.

So my guess is that something is configured differently in windows between the 2 computers.

Would anyone have an idea where to start looking?