Windows XP reserves 20 per cent of your Internet bandwidth for Quality of Service. This is unnecessary, and can be disabled: [£] Open the Group Policy Editor: Start > Run> gpedit.msc > [Enter[£] In the left-hand column in the window, navigate to Computer Configuration > Administrative Templates > Network > QoS Packet Scheduler. [£]In the right column, double-click Limit reservable bandwidth and select Increase your bandwidth by Enabled. Change the Bandwidth Limit to 0 and click OK.