Windows reserves 20% network bandwidth. You can release this
by following these steps.
1. Go to run and type gpedit.msc .
2. Navigate to Computer Configuration ----> Administrative
3. Open QoS Packet Scheduler.
4. Double click Limit Reservable Bandwidth.
5. Not cofigured would be chosen. However by default the value
is 20% .
6. Select enable and make the value 0.
7. This should boost your net speed considerably