Originally Posted by 99s0

I see u have Tunnel adapters as well... try disabling IPv6 to see any difference.

1) In the Network Connections folder, right click on your connections... and then clear out the check box next to the Internet Protocol version 6 (TCP/IPv6) and apply

2)
Open REGEDIT (Open DOS command, type REGEDIT and enter) Then Go to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters\
Right click on the right side (inside parameters) Click DWORD as a type, make a name DisabledComponents, after that, right click on DisabledComponents, modify and add 0xFF and save.

3) restart.

I think it's because if you have too many connections, that mean those connections are leeching your download speed causing slow speed. But sadly this solution doesn't work for me