A common believe is that Windows takes 20% of your bandwidth and reserves it. Of course, this is not true! Disabling the bandwidth limit will not magically speed up your internet, it will simply not allow Windows-related tasks that require bandwidth (e.g. Windows Updates) to reserve bandwidth when they need it. Let’s say you’re playing a game and you enabled automatic Windows updates, you will then suddenly experience significantly more lag when this setting is enabled.
Here are the steps:
1. Enter GPEDIT.msc into the search field on your start menu to open the local policy editor (Important: This feature is not available on Windows 7 Home, see below for more information for Home users)
2. Uncollapse Computer Configuration, Administrative Templates, Network, QoS Packet Scheduler
3. In the right pane, double-click on Limit reservable bandwidth and select Enabled:
4. Enter 0%.
5. Click on Apply.
That's it. The bandwidth limit is now disabled. You can now enjoy using your internet connection to the fullest.