A corrupted download cache is the most common cause of the "Steam must be running" error. Steam keeps a temporary log of license checks; when this log gets corrupted, the game thinks the license is missing.
To resolve the "Steam must be running to play this game" error in Resident Evil 4 A corrupted download cache is the most common
"Maybe the files are corrupted," Leo whispered. He right-clicked Resident Evil 4 in his Library, went to , and clicked "Verify integrity of game files." He watched the bar crawl across the screen, hoping it would find a missing piece of the puzzle. The result: All files validated. Yet, the error persisted. Phase 3: The "Goldberg" Exorcism when this log gets corrupted