War Thunder Not Launching: Fixes That Actually Work

War Thunder failing to launch is one of the most common problems new players hit — and most of the time it is not a broken install, it is a launcher or permission issue. This guide walks the fixes in the order they actually solve it, from fastest to most involved.

1. Verify the game files first

Corrupted or partially downloaded files are the #1 cause of a launcher that opens and then does nothing.

• Steam: right-click War Thunder → Properties → Installed Files → Verify integrity of game files.
• Standalone launcher: open the launcher, go to the game’s settings, and use the built-in file verification / “Check for updates” option.

This alone fixes a large share of “it won’t start” reports.

2. Run as administrator

War Thunder’s launcher sometimes needs write access it does not get by default, especially after a Windows update.

• Right-click the War Thunder / launcher shortcut → Run as administrator.
• To make it permanent: Properties → Compatibility → tick “Run this program as an administrator.”

3. Close conflicting software

Overlays and security tools are frequent launch blockers:

• Antivirus / Windows Defender — add the War Thunder folder to exclusions, or temporarily disable real-time protection to test.
• Overlays — Discord, Xbox Game Bar, Razer/SteelSeries, and recording tools can hang the launch. Disable overlays and retry.
• Leftover processes — open Task Manager and end any aces.exe or launcher processes from a previous failed start before relaunching.

4. Check system requirements and drivers

• Confirm your machine meets the current system requirements — War Thunder’s floor has crept up over the years.
• Update your graphics drivers (NVIDIA / AMD / Intel). A stale driver is a classic cause of a black screen on launch.
• On laptops with two GPUs, force War Thunder to use the dedicated GPU in the OS graphics settings, not the integrated one.

5. Clean reinstall of the launcher

If the launcher itself won’t open:

• Uninstall the War Thunder launcher only (your game files and progress are tied to your account, not the local install).
• Download a fresh launcher from the official site and reinstall.
• Avoid installing into a deeply nested or permission-restricted path; a simple location like C:\Games\WarThunder reduces headaches.

6. Platform-specific notes

• Steam not opening the game — try launching the standalone launcher instead; the two can conflict if both are installed.
• Mac not opening — War Thunder’s Mac support has been limited and varies by version; check the official site for the current Mac build status before assuming it works on your macOS version.

If none of these work, the official support and community channels are the next step — but in practice, steps 1–3 resolve the majority of launch failures. The common beginner mistakes page covers the gameplay-side traps once you are finally in.