Hello, I build a computer for a friend and he has had many problems with it. The most recent is being unable to play Steam games. That is the only game he has so I have other to test on but, as soon as you try and load a "source" game it will say "Engine Error" and then go to message saying "unable to reference memory at 0x102a3e2c at 0x0e2da1a0" and if I play a non-source game like CS or DoD it will play just fine for a while then BAM! BSOD. I have my memory dumps attached. If anyone could help me figure out what is wrong I would be very greatful. I have updates DX9.0c, my ATI driver, my sound driver, and java (someone said that fixed their problem) I don't know what else to do. Please help Thank You! in advance. The System is a: AMD 2500XP+ ASUS A7V880 1GB RAM ATI Radeon 9800 pro 128MB Sound Blaster Live! 24-Bit card.