The parameters and add a DWORD entry named Tcp1323Opts. Then right-click this entry and select New | DWORD value . Give it a value of 3.
Add a DWORD entry named TcpWindowSize and give it a hexa value of 40000.
You must restart the system for the changes to take effect. Your adjustments will make the operating system turn on the Windows Scaling option. Windows Scaling will improve the data flow round-trip time in the TCP stack, so your laptop will increase speed with 802.11n routers in 5-GHz mode. Although there is not a dialog box that you can call to inform you about how much throughput has been improved, you will see a real difference in later downloads.