Please Help Wont Work Memory Couldnt Be Read

[wolvesrdogs]

760mb RAM
2.53ghz P4
64mb graphics card

i fixed hl2 and css by writing stuff in launch options
but i dont work 4 hl2dm
when it gets to loading screen it crashes and says
the memory could not be read
click here to terminate the program

 

[aeroripper]

close all other unessary programs (virus scans included)

try again... IIRC some other people are having this problem but its most likely just their crappy unkept computer