I think this is what you have to do from the video:
In the command console (click on the start, type CMD and it should appear at the top of the list, right click and run as administrator and you should see the C:\WINDOWS\system32> prompt)
My comments will be in brackets ()
Windows 7/8 - as I couldn't get the commands shown in the video to work as is I've given the win 8 version too
It is possible to cut and paste the commands into the console. Copy the commands to notepad and edit them to remove any comments or extra brackets, highlight and copy the command. In the console, right click and show should get the option to paste, select that and then press <enter>
Windows 7?: netsh interface ipv4 subinterfaces
Windows 8: netsh interface ipv4 show subinterfaces
(Note the figures for the three readings 4 0 and 4 in the video and also the interface name). I'm assuming you should get a Packets: Sent = 4, Received = 4, Lost = 0 <0% loss> as an ideal result - please edit as required if I have misunderstood the video.
ping google.com -f -l 1472
(note the readings) (-l is a little L )
(Repeat, gradually lowering the number. Once you get a lower but stable reading do the following command where "Ethernet" is the name you noted at the beginning)
netsh interface ipv4 set subinterface "Ethernet" mtu=1452 store=persistent
You should then get an "Ok." response
Hope that helps.
