How to Troubleshoot Steam Error Code 51 – Game Failed to Start on Windows 10

Steam error code 51 indicates that another program installed on your computer interferes with the game files and prevents your games from running. This error often occurs after you update games in the game client.

What causes error code 51  in Steam?

How to resolve error code 51 in Steam?

Check the integrity of the game files

  1. Start the Steam client as an administrator and click the LIBRARY tab on the top menu bar.
  2. Then right-click on the problem game and select the “Properties” option.
  3. Then, switch to the Local Files tab and click on the Check game file integrity option.
  4. After that, Steam will start checking the game files and will try to replace any erroneous or missing game files.
  5. This process will take some time, so please be patient.
  6. Then close all Steam-related tasks in the task manager and restart the Steam client as an administrator.

Changing the Game Configuration

First, close the Steam client completely via Task Manager. Then open the “Run” dialog by pressing the Windows + R key combination. Then enter the following command:=&0=&