When starting HL2 up the first "Loading" screen displays briefly, then goes away. A dialog displays with the error message, "failed to lock vertex buffer in CMeshDX8::LockVertexBuffer
". I hit the button and it goes away and another box says, 'The instruction at "0x241f94f7" referenced memory at "0x0e5cf41c". The memory could not be "read".'
I was able to play it until I had got a virus and had to re-install Windows, reformatting the harddrive along the way. I've had to re-install all my programs and only have IE7, Firefox, HL2, Counter Strike , Garry's Mod, Source SDK, BioShock Demo, and Steam installed so far.
Any ideas?
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