Some Call of Duty players on Steam are encountering a persistent 'Fatal error, steam must be running' message that blocks game launch. Efforts like reinstalling Steam, updating BIOS and drivers, disabling firewalls, and verifying game files have not resolved the problem for affected users. This suggests a widespread compatibility or launch issue impacting player access and experience. Until developers address it, affected players may be unable to play the game on Steam.
- Issue persists despite common troubleshooting steps.
- Potentially widespread problem affecting Steam users.