Disable network optimization which make inet connection slow
netsh int ip reset C:\netsh.log.txt
netsh winsock reset
Now it will reset all your network settings into defaults.
Disable TCP Auto-tuning .:
Like before, search for cmd.exe and open command prompt with administrator privilege (Run as Administrator). Then type line and hit enter.
netsh interface tcp set global autotuning=disabled
If it doesn't make any optimization in your internet download speed, type following code to turn it back on.
netsh interface tcp set global autotuning=normal
Disable the DHCP Broadcast Flag .:
Since Windows 7 can't find an IP address from several non-Microsoft DHCP servers, it will cause your internet browser to load web pages at a very slow speed. So you need to disable this option using Windows registry editor.
To disable the DHCP option in Windows 7 .:
Type view network connections in program search box located in the bottom of start menu and open the program.
Then choose and right click your default internet connection and select properties.
In networking tab, click properties of internet protocol version 6(TCP/IPv6) and you will see a general configuration window.
Now choose both Use the following IPv6 address option and Use the following DNS server addresses option and enter the static IP address mentioned in your router manual into both IPv6 Address and Preferred DNS Server fields. Probably you can find your IP address since they mention it as default IP gateway or something similar to it.
Now do the same on internet protocol version 4(TCP/IPv4) and complete the task.
By applying these settings you can disable DHCP in your chosen connection.
Now try to connect to the internet with your default browser. If you still have the Windows 7 slow internet speed try disabling IPv6 protocol.
Disable IPv6 on Windows 7
Open the same network connections window and choose your default network adapter to view itsproperties. Choose Networking tab and uncheck the box called Internet Protocol version 6 (TCP/IPv6) or completely uninstall it from your computer. Finally open Device Manager and remove or disable any other tunnel, miniport IPv6 adapters.
Disable Windows Firewall or Router Firewall .:
Sometimes the Windows 7 firewall crashes with the built-in firewall program on you router. So you can turn off one of them to speed up your internet connection.
To turn off windows firewall .: