It’s a very little known trick that you can increase your browsing speed under Windows XP Professional by 20% with a quick tweak to the Qos Packet Scheduler. By default, Windows keeps this 20% in reserve for Windows Updates, so if you’re and XP Pro user and you want a little speed boost, then follow along!
Go Start>Run and type in gpedit.msc
From here, expand the Administrative Templates selection, then the Network tab.
Select Qos Packet Scheduler.
Now click on Limit Reservable Bandwidth and check the “Enabled” selection box.
Now change the Bandwidth limit to 0%, click Apply and restart your PC. You should then see an improvement in your browsing speed. If it didn’t work, make sure you’re running Windows XP Professional.
Should you ever want to go back to the way things were, just follow the steps again and un-check the Limit Reservable Bandwidth selection again, click Apply and restart again.