help!11 :(((

when i use the startmovie command in the console, i get this error message that crashes hl2.exe everytime

“The instruction at “0x00010101” referenced memory at “0x0bae1701″. The memory could not be “written”.”

i could really use some help here, i have verified the integrity of the game cache and reinstalled the game.

anyone? :((((((((