To optimize your Internet speed and your ping time in games such as Counter-Strike, Quake 3 ... or simply to give a boost to your connection, follow these steps:
Log on as Administrator.
Start / Run, type "gpedit.msc".
Turn left, go to Computer Configuration / Administrative Templates / Network / QoS Packet Scheduler.
Right, right click on Limit bandwidth booking and choose Properties from the menu.
Make sure the Enabled button is checked and it says Bandwidth Limit (%), set the counter equal to 0.
Close everything and restart your PC for the changes to be supported.