How to Fix Lag Spikes in Games (Network and System)

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Lag spikes are the worst kind of lag — everything’s fine, then suddenly you freeze or teleport at the exact wrong moment. The tricky part is that “lag spikes” can be network OR system, so this guide helps you tell them apart and fix both.

How to Fix Lag Spikes in Games (Network and System)

If the whole game freezes briefly, it’s usually system/frame-time. If only other players teleport while your FPS stays fine, it’s network.

First, figure out which kind you have

Turn on an in-game FPS and latency/ping overlay:

  • FPS drops during the spike → system or frame-time issue (drivers, power, background apps, storage).
  • FPS stays high but ping jumps / players warp → network issue.

Diagnosing this first saves you from chasing the wrong fix.

Fix network lag spikes

  1. Switch to wired Ethernet instead of Wi-Fi.
  2. Close bandwidth hogs (downloads, cloud sync, streaming, updates).
  3. Reboot your router/modem and update its firmware.
  4. Disable Wi-Fi adapter power saving in Device Manager.
  5. Measure with ping -n 50 8.8.8.8 and tracert — full steps in How to Fix High Ping and Packet Loss.

Fix system lag spikes

  1. Set the Windows power plan to High Performance.
  2. Update or clean-install your GPU driver.
  3. Close background apps and disable Steam/Discord overlays.
  4. Install the game on an SSD to stop streaming stalls.
  5. Disable unnecessary startup apps and Windows background tasks.
  6. Consider disabling VBS for extra CPU headroom.

Catch the background culprit

A scheduled task or app waking up mid-game causes periodic spikes:

  1. Open Task Manager → Processes and sort by CPU, Disk, and Network during play (alt-tab quickly or use a second monitor).
  2. Watch for an app that spikes right when the game stutters — antivirus scans, Windows Update, backup tools, and browser tabs are common offenders.
  3. Schedule scans and updates for when you’re not gaming.

Stop Windows Update and telemetry mid-game

  1. Pause Windows Update before long sessions.
  2. Disable nonessential scheduled tasks that run on a timer.
  3. See How to Debloat Windows for Gaming for a deeper cleanup.

Lower input latency overall

Once spikes are gone, tighten the baseline with How to Minimize Input Delay for Competitive Gaming, The Ultimate Guide to Timer Resolution for Gaming, and Tier1Timer.

Fix lag spikes by first identifying network vs system, then attacking the right one: go wired and clean your connection for network spikes, or fix power, drivers, storage, and background apps for system spikes.