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I vaguely recall there’s a Windows service you need to turn off to stop your ping spiking if you use wireless. Pls, what’s it called?

wlan optimizer ftw

Quoted from Carlos Kaiser

Network Issues: Ping Spikes and Stuttering
http://forums.steampowered.com/forums/showthread.php?t=1043281
Disables Windows network throttling feature. This tweak can resolve chronic ping spikes and stuttering. Highly recommended for everyone.

http://www.martin-majowski.de/wlanoptimizer/ (for wireless users only)
Windows comes with a service that automatically searches for new wireless providers at regular intervals. Each time performs the check it causes a brief ping spike or “halt.” This program disables the service.

feel free to credit your source ;)