Network UTorrent Issue

Now to the point of the post. I installed Windows 7 RTM from MSDN when it got out (not sure about the build number, but it is RTM). My problem is that it has this nasty bug as far as I can see.

I use uTorrent for file sharing and so on, but when the bandwidth gets max'ed out, my connection with the router dies. Before you jump out with conclusions and some questions I must add that the router is perfectly set-up, using WPA2-PSK, connecting 3 computers in total. I did not have this issue on XP Pro, I did not have this issue in Vista SP1/SP2 but I do have it on 7 RTM Ultimate.

I do own another laptop with Vista (no SP installed) and it acts the same sometimes but not as often as this PC does. The only solution so far was to restart the router, keep it offline for 10 secs then turn the power back on. Then the router resends IP info and so on and the PC's internet connection works again. My drivers are properly installed and are 7 certified and so on. So as far as I can see, there is a bug with 7 or something. I thought it was because of the max half-open connection settings, but as far as I can see my build has no limitations, only the RCs had so there's nothing I can do there. UAC is turned off, so is every firewall except for the router's which is perfectly set-up.

I do not know what to do more.

IPv6 is also checked out, as I read on another forum that it could be problem (and also the solution for others).

This only happens when using P2P programs (as far as I can tell) because when I download/upload something via FTP clients or Firefox even...it doesn't go offline. This is some weird behaviour.

I also sent an e-mail to Microsoft telling them about this and they simply replied that my version is beta. I did add the fact that my version is RTM (which I remember that stands for 'Release to Manufacturing' which could mean it's a final of sorts) but they haven't replied ever since, totally ignoring the issue (they did tell me that in the RTM this problem was solved - but I couldn't find a single person saying that the final versions of the RC had this bug anymore and still, the RTM has it).

I have also read that first Vista RTM had this problem as well and it was solved in SP1, but the fact is that Microsoft does not emphasize on this matter, did not release any separate fix or info, all they say is that if you install SP1 to Vista then you need not worry anymore.

It is annoying to have issues, and especially pressing issues like this one (I simply can't stand it anymore as I can not even browse the net sometimes because of this bug or whatever it is).