Go to Desktop -> My computer -> (right click on it) -> Manage ->  now u see a window of  Device Manager

 

Now go to Ports -> Communication Port (double click on it and Open).

 

There may be 2 of them Communication Port 1 , Communication Port 2 ,double click on it

 

Go the Port Settings :--

 

and now increase ur "Bits per second" to 128000.

 

and then "Flow control" change to Hardware.

 

It should immediately increase your internet speed atleast twice.

 

In case it doesnt please restart and it should work.

 

I dont know whether it will work but for desktops it must.

 

I  got to know it only a couple of days earlier.So i felt all of us here should benefit from it.

 

Please rate if you find it useful.