Getting Started

Installing LagInspector and running your first diagnostic, start to finish — including the best workflow if you're on a single monitor.

1

Claim your beta code

Go to the claim page and click "Get my beta code." You'll be given a one-time code — copy it, you'll need it in step 3.

Claim page showing your beta code, ready to copy
2

Download and install

  1. Download the installer from the link on the claim or redeem page.
  2. Run it. Windows may show a "Windows protected your PC" SmartScreen warning, since this is a new app — click More info, then Run anyway.
  3. Follow the installer through to completion.
Windows SmartScreen warning with Run anyway button visible
3

First launch

Enter your beta code when prompted, then select which game you're testing. If you're using iRacing, you'll be asked to confirm your app.ini location — this is normally found automatically.

Game selection screen listing the supported games
4

Running your first diagnostic

You need to be in a genuine online session with the game actively running — offline practice or solo modes won't produce any real traffic to capture.

Recommended if you're on a single monitor

Use a Scheduled Run. This is especially useful for games like Rocket League, where switching back to your desktop mid-match to start a manual test is awkward. Instead: set a scheduled run for a few minutes ahead before you queue into a match, then just play normally. LagInspector captures automatically in the background — no alt-tabbing required. Your report saves quietly; find it afterward in Report History.

Schedule a run panel with time picker and Start schedule button

Manual run (if you're on a second monitor, or don't mind briefly switching away):

  1. Get into your online match first.
  2. Alt-tab to LagInspector and click Run Diagnostic.
  3. Switch straight back to the game and keep playing normally for the capture duration.
Capture duration selector and Run Diagnostic Test button
5

Reading your report

Your report opens automatically once the capture finishes (or find it any time in Report History). You'll see two scores — Network and PC Performance — followed by a plain-English explanation of what's actually causing any issues, and specific fixes if something's found.

Sample LagInspector report showing Network and PC Performance scores

Tip: playing in exclusive fullscreen

If you'd rather not use scheduled runs, switching your game's display mode from Fullscreen to Borderless Windowed makes Alt-Tab instant, with no mode-switch delay or flicker. Most games have this under Display or Graphics settings, with no meaningful performance cost on modern systems.