This simple windows trick will increase your internet speed to high speed ,this trick works on windows xp service pack 3 and windows vista

1. First, Open the Windows Registry ,Go to Start> Run >then type Regedit, then navigate to below location.
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Servic es\Tcpip\ServiceProvider

2. Note the following lines (all hex dwords):
Class = 008- ( Indicates that TCP/IP is a name service provider, don't change
LocalPriority = 1f3 (499) - local names cache
HostsPriority = 1f4 (500) - the HOSTS file
DnsPriority = 7d0 (2000) - DNS
NetbtPriority = 7d1 (2001) - NetBT name-resolution, including WINS
3. What we're aiming to do is increase the priority of the last 4 settings, while keeping their order. The valid range is from -32768 to +32767 and lower numbers mean higher priority compared to other services.,
4. Change the "Priority" lines to:
LocalPriority = 005 (5) - local names cache
HostsPriority = 006 (6) - the HOSTS file
DnsPriority = 007 (7) - DNS
NetbtPriority = 008 ( NetBT name-resolution, including WINS
5. Reboot for changes to take effect