Crash-Proofing
Doorknob 2004

Mac, a computer geek, is running a new computer operating system called Doorknob 2004.

Mac discovers that if he runs his Starbattle screensaver at the same time as his Fate Buster arcade game, the system will crash.

If he begins running his Wordwonder wordprocessing program before he starts the Fate Buster arcade game, the system will not crash. If he starts the Fate Buster arcade game before Wordwonder, then the system will crash.

Mac cannot run PurePaint painting program at the same time as the Fate Buster arcade game.

The Fate Buster arcade game cannot be run at the same time as the Spread-X spreadsheet.

Unless otherwise stated, Mac can run any of these programs together without crashing. What is the maximum number of these programs that Mac can run without crashing, and what are the programs?

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