Ohh, interesting. This gotta be that company in russia or whatever that DDoS's torrent downloaders to prevent them from downloading. I have no clue how to do it on windows, but if you use linux its easy to block. Alternatively you could setup DDWRT or something like it on your router and block it. I am thinkin iptables at least, should fix it. If it does not i guess you need a connection aware firewall, I use Vuurmuur a lot.