Each version of Microsoft Windows keeps 20% of the total bandwidth reserved for its own. You can use all the bandwidth just by closing it.
Please do the following procedures:
1 => start menu► click to run gpedit.msc ► Click on ENTER
2=> Local Computer Policy >> Computer Configuration >> Administrative Templates >> Networks QOS Packet Scheduler Posts Limit Reservable Bandwidth
3=> Double click on Limit Reservable Bandwidth. Now see not configure 20% or 80% is the default.
Click Enable and apply bandwidth by 0% ... now you used full bandwidth
Thanks for important tips.
Nice post