Steam Error Code 402: How to Fix It

Easy 10-30 minutes Medium Severity Verified June 2026
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Error Code
402
Brand
Steam
Product Type
game_launcher
Severity
Medium
DIY Difficulty
Easy
Estimated Fix Time
10-30 minutes
Steam Error Code 402 means Steam is unable to load HTML5-based content, which is used in areas like the Steam Store, Community pages, and the built-in browser overlay. This typically happens when Steam's integrated CEF (Chromium Embedded Framework) browser components are corrupted, outdated, or blocked by your system. The good news is that this error is almost always fixable through software-level steps without any hardware changes.
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Tools You'll Need

How to Fix Error Code 402

  1. Restart Steam Completely

  2. Clear the Steam Browser Cache and Cookies

  3. Flush the Steam HTML Cache (CEF Cache)

    Do not delete any files outside the htmlcache or cef_cache folder. Deleting core Steam files can break your installation.

  4. Run Steam as Administrator

  5. Check Your Firewall and Antivirus Settings

    Only disable antivirus temporarily for testing. Re-enable it immediately after the test and add proper exceptions rather than leaving it off.

  6. Update or Reinstall Steam's CEF Browser Components

  7. Check for Windows/macOS/Linux System Updates

  8. Reinstall Steam (Last Resort)

    Back up your game saves before reinstalling. Some games store save data locally in the Steam folder and may be lost during an uninstall if not backed up.
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When to Call a Professional

Steam Error Code 402 is a software-level issue that virtually never requires professional help. However, if you have exhausted all steps above and the error persists, consider posting on the Steam Community Forums (store.steampowered.com/forum) or contacting Steam Support directly at help.steampowered.com. Steam Support can investigate account-specific issues or server-side problems that may be contributing to the error. If you suspect your network hardware (router, modem) is causing persistent connectivity issues with Steam's servers, contacting your internet service provider or a network technician may help.

Frequently Asked Questions

What does Steam Error Code 402 mean?
Steam Error Code 402 means Steam is unable to load HTML5 content. Steam uses a built-in browser engine called CEF (Chromium Embedded Framework) to display the Store, Community, and other web-based features. When that browser engine encounters a problem loading content, it throws Error Code 402.
Why does Steam keep showing Error 402 after I restart?
If Error 402 persists after a restart, the most likely cause is a corrupted HTML or browser cache, a firewall or antivirus blocking Steam's web components, or outdated CEF files. Try clearing the browser cache in Steam Settings, flushing the CEF cache folder manually, and checking that your antivirus is not blocking 'steamwebhelper.exe'.
Does Steam Error 402 mean my games are at risk?
No, Steam Error 402 only affects HTML5-based content like the Store pages and Community features. Your installed games, game saves stored in the Steam Cloud, and your account are not at risk. The error is limited to Steam's built-in browser layer.
Can Steam Error 402 be caused by a server outage?
Yes, occasionally Error 402 can be triggered by Steam server-side issues, particularly with the Steam Store CDN or community servers. Before troubleshooting your own system, check the Steam status page at store.steampowered.com/stats or sites like downdetector.com to see if other users are reporting problems at the same time.
Will clearing my Steam browser cache delete my games or account info?
No. Clearing the Steam browser cache and cookies only removes temporary web data used by Steam's built-in browser. It will not delete your installed games, unlink your account, or remove any game progress. You may need to log back into some Steam web features after clearing cookies, but your full account remains intact.

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