hl2 memory read error

[amdphr3@kXP]

Ok...I have issues here...

Im up to the part where alyx takes me 2 play with the anti-grav gun...when I reach the door that I entered in the 1st place...the game crashes...and displays a msg saying instruction xxxxx or whatever...the memory could not be read. Has neone come across a workaround for this prob?

My specs are:

Amd athlonXP 2400+ @ stock clocks

1gb ram...which is fine

Nvidia Geforce FX 5600 Ultra 128Mb

Gigabyte GA-7N400 Pro 2 mainboard w/Nforce 2 chipset

40 Gb hdd

Win xp pro w/SP2 installed and latest hotfixes

Latest drivers installed

DX 9.0C installed