1.) log on as Administrator. 

2.) start - run - type gpedit.msc 

3.) expand "local computer policy" 

4.) then expand "administrative templates" 

5.) then expand "network branch" 

6.) Highlight the "QoS Packet Scheduler" 

7.) on right window double click "limit reservable bandwidth" 

8.) on setting tab check the "enabled" 

9.) change "Bandwidth limit %" to 0 

You're done.It would be a good idea to reboot after this