Exception raised- keeps crashing

Just the other day, out of the blue, when i started up the game, it played until the san andreas logo and then gave me a pop up error messaging saying "exception raised - Unhandled page fault on read access to 0x00000000 at address 0x004e0403. Do you wish to debug it?" No matter if I press yes or no, it doesn;t seem to be doing anything. It just crashes. Extremely frustrating. Please fix.

dflavia5 about Grand Theft Auto: San Andreas, v1.02