How to Fix Lag Spikes on Windows 7
Periodic computer network delays or "lag spikes," have little to no impact on Web browsing and email performance, but can ruin the delivery of video game content by causing video artifacts and even complete disconnection. Microsoft Windows 7 computer users sometimes experience lag spikes when playing online video games. Change the Windows 7 MMCSS, or Multimedia Class Schedule Service, configuration to fix lag spike issues with online games.
Click the "Start" button on the Windows 7 taskbar and click the "Search" box. Type "regedit" in the "Search" box and tap the "Enter" key.
Navigate to the "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Multimedia\SystemProfile" directory in the "Registry Editor" window that appears.
Double-click on the "NetworkThrottlingIndex" key. Type "FFFFFFFF" into the "Value data" field of the window that appears.
Click the "OK" button. Click the "X" located in the upper-right corner of the "Registry Editor" window to close the window. Reboot the computer.