XP: Prevent QOS (Quality of Service) from Reserving Bandwidth

Posted December 8, 2003 by AlexTheBeast in Windows

Many people believe that the QOS changes to TCP/IP decrease your Internet speed. The following describes how to change this.


Quality of Service (QOS) by default reserves 20% of your bandwidth. Superfically this sounds like you lose 20% of your bandwidth when QOS is enabled. QOS has been designed to ensure that certain programs that need a particular amount of bandwidth can reserve it.

If these bandwidth-demanding programs are not running, then QOS is not going to kick in and reserve this space. So relax! If this type of program is running, then you want to be able to give it all the bandwidth it needs.

For further discussion you can read the microsoft support article on this topic: http://support.microsoft.com/default.aspx?scid=kb;en-us;316666

Despite all of that, here’s the recipe…

Changing/Disabling the QOS in XP Pro:

1. Be sure that you are logged in as administrator.
2. Select Run from the Start Menu.
3. In the Open box type gpedit.msc and click OK.
4. When the Group Policy Editor opens, double click computer configuration to expand.
5. Double click administrative templates .
6. Double click Network.
7. Double click QoS Packet Scheduler .
8. Double click Limit reservable bandwidth.
9. Select the Setting Tab.
10. Click the Enabled Option.
11. Change to the Bandwidth limit % to whatever you wish it to be. You would change it to 0% to turn it off.
12. Click OK.
13. Exit the Group Policy Editor.
14. Reboot

I have searched for a registry edit for XP home, and those particular registry keys are not in the Home version of XP.

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