Limit reservable bandwidth
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% of the bandwidth of a connection, but you can use the setting to override the default.

Here is how to reclaim your bandwidth:

Click Start -> Run -> and type gpedit.msc
Got to Computer Configuration -> Administrative Templates -> Network -> QOS Packet Scheduler -> Limit Reservable Bandwidth
Double click Limit Reservable Bandwidth, tick Enable and change the Bandwidth limit (%) to 0

Filed under: Microsoft, Tips and Tricks