If your trainer isn't working or the game is crashing, follow these steps to resolve 99% of common issues: Known Issues in Call of Duty: Warzone - Activision Support
A: Black Ops (2010) is not on Battle.net – only on Steam. So any Steam fix works. Call Of Duty Black Ops Trainer All Versions Fix
To fix the Call of Duty Black Ops trainer for all versions, follow these steps: If your trainer isn't working or the game