This is a crash, as you might know.
And this can be caused by many different things. However, Valve has put a Support section on the Steam website where you can find more information about fixing the problem.
The current link below will send you to the proper fix.
Half-life 2. "memory could not be read" - by Baggins on 04-05-2007 at 09:02 PM RE: Half-life 2. "memory could not be read" - by vikke on 04-05-2007 at 09:33 PM
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