Complex sentence: Another wide spreed cause of the game not running is because the game is protected with SafeDisc, with games protected by SafeDisc when running a restricted user account with fast user switching under Windows XP, some games will not start correctly.
Split into simpler sentences: Another wide spreed cause of the game not running is because the game is protected with SafeDisc. When executing games protected by SafeDisc on a restricted user account with fast user switching under Windows XP, some games will not start correctly.