CounterStrike Source Just won't boot up

[DarkShadow]

I've done a fresh format, installed HL2 + CSS from the dvd and let them update.

HL2 Boots up but strangely enough it just 'dissapears' from the desktop.

Any ideas?

Cheers.

 

[DarkShadow]

So thats HL2, firefox, and ATi CCC that all fall over for you.

You checked that ram of yours with memtest?

Failed with 11 errors

Thanks for pointing it out!

 

[DarkShadow]

Right ram is sorted, still having the same problems!

Any ideas?