QoS Packet Scheduler is a method of network bandwidth management that can monitor the importance of data packets and depending upon the priority of the packet, give it higher or lower priority or bandwidth levels. It's not very useful unless you're using apps which are QoS-aware or running a server, so you can gain some network overhead back by turning it off.
Make sure you're logged on as actually "Administrator". Do not log on with any account that just has administrator privileges.
Expand the Local Computer Policy branch.
Expand the Administrative Templates branch.
Expand the Network branch.
Highlight the "QoS Packet Scheduler" in left window.
In right window double click the "limit reservable bandwidth" setting.
On setting tab check the ENABLED item.
Where it says "Bandwidth limit %" change it to read 0 (ZERO).
Close gpedit.msc.
