Speed up your Internet by increasing Band-Width By 20%

Microsoft reserves 20% of your available bandwidth for their own purposes like Windows Updates and interrogating your PC etc

To get it back:

Click Start then Run and type "gpedit.msc" without quotes.
This opens the group policy editor. Then go to:Local Computer Policy
then Computer Configuration
then Administrative Templates
then Network
then QOS Packet Scheduler and
then to Limit Reservable Bandwidth.
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 Win 2000 as well !!!