Step one:

1. Right click the desktop left click on new then select notepad.
2. Open the file you created then copy and paste the lines listed below:

REGEDIT4
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters]
“TcpWindowSize”=dword:faf0
“Tcp1323Opts”=dword:0

Step two:

[Version]
signature=$CHICAGO$
[DefaultInstall]
DelReg=Delete_Reg_Entries
[Delete_Reg_Entries]
HKLM,System\CurrentControlSet\Services\Tcpip\Parameters,TcpWindowSize
HKLM,System\CurrentControlSet\Services\Tcpip\Parameters,Tcp1323Opts

Save this file as undo.inf (Just in case you want to undo the changes).

Step three:

Double-click tweak.reg to modify the registry. Right-click the file undo.reg and choose Install to undo the changes. Remember you must restart your computer for the changes to take effect.

So what is this doing exactly?

If you are curious, RFC1323 options, especially TCP Timestamps Option, uses 10 bytes per packet, so you disable it to gain a slight bit of throughput. However depending on the type of internet traffic experience various significantly from not havng any inpact to report that connection speeds nearly tripling. While I would like to report a significant increase I, for one, did not notice improvements to that degree.
All of the RFC1323 options that I am presently aware of are listed below:

0 = disable RFC 1323 options
1 = window scale enabled only
2 = time stamps enabled only
3 = both options enabled