51
Moderate
Steam · Gaming
Steam game launch was blocked by file, dependency, or anti-cheat preload issues.
Quick Answer
Error code 51 on your Steam Gaming means: Steam game launch was blocked by file, dependency, or anti-cheat preload issues.. This is usually fixable — see the step-by-step guide below.
Affected Models
Specific models affected
Likely Causes
How to Fix It
1
Verify integrity of game files in Steam.
2
Run Steam and game as administrator.
3
Repair/install required Visual C++ and DirectX runtimes.
4
Whitelist Steam/game folders in antivirus.
5
Reinstall the game if launch still fails.
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Related Error Codes