Microsoft reserves 20% of your available bandwidth for their own purposes like Windows Updates and interrogating your PC etc. Click
Start then
Run and type
gpedit.msc. This opens the group policy editor. Then go to:
Local Computer Policy-->Computer Configuration-->Administrative Templates-->Network-->QoS Packet Scheduler and then to
LimitReservableBandwidth. Double click on
Limit Reservable bandwidth. It will say it is not configured, but the truth is under the '
Explain' tab i.e."
By default, the Packet Scheduler limits the system to 20 percent of the bandwidth of a connection, but you can use this setting to override the default." So the trick is to
ENABLE reservable bandwidth, then set it to
ZERO. This will allow the system to reserve nothing, rather than the default
20%.It works on Windows 2000 and XP as well
