I’ve been having some major problems with my internet. Whenever I used to download a huge file or so, the internet stopped working and I had to restart my modem (motorola). I called the cable company lots of times and everytime they said that the problem is at my end, that I’ve to check my computer for trojans, malware and what not.

Anyway, after a lot of research I found a solution, tried it and it’s working fine since then. I’m using Windows 7  Home Premium x64 version and this is what I did

1. Goto Run and type in CMD for command prompt.
2. Type in these commands (Press Enter after each of them).
   

   netsh interface tcp set global rss=disabled
   netsh interface tcp set global autotuninglevel=disabled
   netsh int ip set global taskoffload=disabled

This will basically solve your problem. If it doesn’t work

Disable SNP in Windows 7 by setting Registry as following:  Note: Please perform a full-system backup first.

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters]

EnableTCPChimney=dword:00000000

EnableTCPA=dword:00000000

EnableRSS=dword:00000000

If the keys do not exist, just create them and assign the value. Hope this helps