Increase Bandwidth usage for faster network connection in Windows XP Professional

Windows XP will restrict "best effort" traffic to 80% of the bandwidth even if you send a data with highest priority. To change this
Log in as Administrator
Click Start
Click Run
Enter gpedit.msc
Select Local Computer Policy
Select Administrative Templates
Select Network
Select QOS Packet Scheduler
In the right window, double-click limit reservable bandwidth
On setting tab, check enabled setting
Bandwidth limit % value = 0
Click OK
Close gpedit.msc
Click My Computer
Select My Network Connections
Select View Network Connections
Right-click your connection
Under Protocol Properties, check QOS Packet Scheduler
Reboot