Increase your netspeed

go to desktop->My computer-(right click on)->manage->
->Device manager->
now u see a window of Device manager
then go to
Ports->Communication Port(double click on it and Open).
after open u can see a Communication Port properties.
go the Port Setting:----and now increase ur "Bits per second" to 128000.
and "Flow control" change 2 Hardware.

U WILL NOTICE AN IMMEDIATE RESULT
this will increase the receiving capacity of your input port and thus ur netspeed will be increased. :)