A corrupted or missing steam_api.dll file is the most common trigger for this specific error. Steam can automatically scan and replace any broken files. Open your Steam . Right-click on DmC: Devil May Cry and select Properties . Go to the Installed Files (or Local Files ) tab. Click the "Verify integrity of game files" button.
A very frequent cause of this error, especially for older games, is a missing or improperly registered steam_api.dll file. This file is the primary bridge for the game to communicate with Steam's DRM services.
Locate the and delete it (this will not delete your games). Restart Steam and log back in. 4. Configure Firewall Exceptions A corrupted or missing steam_api
Follow these steps in order. Do not skip the verification steps.
Here are the fixes for the "Steam must be running" error, ordered from simplest to most comprehensive. It's highly recommended to start with the first method and work your way down. Right-click on DmC: Devil May Cry and select Properties
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Data Execution Prevention (DEP) is a security feature in Windows that sometimes mistakes DmC ’s executable for a threat. Because the game is older, DEP can block it from communicating with Steam. A very frequent cause of this error, especially
: This is a classic fix for Steam communication errors. Close Steam completely, navigate to your Steam installation folder (usually C:\Program Files (x86)\Steam ), locate the file named ClientRegistry.blob
: This checks for missing or corrupted data. In your Steam Library, right-click DmC: Devil May Cry Properties Installed Files , and click Verify integrity of game files Whitelist the Game in Antivirus/Firewall : Overzealous security software like Bitdefender Windows Defender may block the game's