Fix it in order
- Update the GPU driver to the version Activision recommends, then reboot before relaunching.
- Fully exit Steam or Battle.net from the tray, then start the launcher as administrator.
- Verify the game files in the launcher, then launch MW4 once with no overlay running.
- Uninstall input remappers, recorders and overlay tools if crashes persist, then retest one at a time.
- If it still crashes, check thermals and that the PC meets the minimum spec.
How sure we are
- Status
- Official steps
- Confidence
- High
- Last checked
- 2026-10-19
These steps come from first-party support documentation. If they fail, the issue is likely on the game or hardware side, so report it with the time and the platform build.
Still broken?
Check the MW4 news feed for a patch note that names this issue, and the field upgrade unlock levels if your class changed after an update. If a fix here is out of date, send the correction to contact@mw4field.com.