Avoid using desktop shortcuts. Run the game directly from its root folder (e.g., BlackOps.exe Disable Compatibility
A: No. Call of Duty: Black Ops uses Steam Cloud to store your single-player campaign progress. It will automatically sync your saves after a reinstall. Exe-cannot-find-zone Black Ops Fix
The localization.txt file in your root folder does not match the language packs installed. Avoid using desktop shortcuts
Before diving into the fixes, it helps to understand what causes this issue [1, 2]: Exe-cannot-find-zone Black Ops Fix