Internet is not working properly.

  shadowy21 11:59 07 Dec 14

My internet is connected but not working properly. Downloads stop after a few kb, pages don't load, torrents are not working, etc.
The thing is that I called tech support for My ISP (RDS Romania) and they brought a laptop on which they connected the cable, and on their machine it was working fine. I also took my PC to a friend's house (with exactly the same ISP and internet plan, cable, modem, everything) and his internet was working on my PC.
My internet plan is for 1000 mbps, and it wasn't working. I changed the network card options to limit it to 100 mbps and it worked for a few days until I tried some commands (reseting ipv4,ipv6 and winsock, changed MTU from 1500 to 1492) to make 1000 mbps work, then it stopped working at all, even at 100 mbps.
my specs:
Windows 7 Ultimate Service Pack 1
NEW Network card: D-Link DGE-528 T Gibabit Ethernet Adapter

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