Cache Needs Repair error

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This error occurs when certain game cache files have encountered an internal problem (usually after a crash while running a game).

To repair the cache file:

  1. Shutdown Steam by choosing Exit from the Steam task bar icon menu.
  2. Restart Steam.
  3. Run Half-Life: 2 from the Steam Play Games window.
  4. If the problem is not resolved, repeat these steps running Counter-Strike: Source and Half-Life 2: Deathmatch.

Running these applications causes them to validate and repair any cache problems they may have.