The Limit reservable bandwidth machine setting should be configured correctly. Determines the percentage of connection bandwidth that the system can reserve. This value limits the combined bandwidth reservations of all programs running on the system. By default, the Packet Scheduler limits the system to 20 percent of the bandwidth of a connection, but you can use this setting to override the default. If you enable this setting, you can use the "Bandwidth limit" box to adjust the amount of bandwidth the system can reserve. If you disable this setting or do not configure it, the system uses the default value of 20 percent of the connection. Fix: (1) GPO: Computer Configuration\Administrative Templates\Network\QoS Packet Scheduler\Limit reservable bandwidth (2) KEY: HKLM\Software\Policies\Microsoft\Windows\Psched\MaxOutstandingSends