By default, windows limit bandwidth usage only 20% of the total obtained, to change it we must set parameters in the "Limit Reservable Bandwidth".
The steps are as follows:
1. Click start -> run, type "gpedit.msc", press "Enter ".
2. Select Computer Configuration -> Administrative Templates -> Network ->
QoS Packet Scheduler.
3. Click 2 times the "Limit Reservable Bandwidth".
4. In the window "Limit Reservable Bandwidth Properties", select "Enabled"
and set "Bandwidth Limit to " "0 ", click "OK".
5. Reboot
The steps are as follows:
1. Click start -> run, type "gpedit.msc", press "Enter ".
2. Select Computer Configuration -> Administrative Templates -> Network ->
QoS Packet Scheduler.
3. Click 2 times the "Limit Reservable Bandwidth".
4. In the window "Limit Reservable Bandwidth Properties", select "Enabled"
and set "Bandwidth Limit to " "0 ", click "OK".
5. Reboot