nope

i have 2.5gb of ram, and i have no swap file to be overwritten...

(when a program needs memory, windows will give it to the program - but it will give it free memory. the only time you can have memory problems is when you are writing/reading directly to/from memory - this is done a lot in c, which is what css is written in - but any problems there and its valve's call)

when the game has no/lost focus valve have implamented a procedure to slash the FPS and therefor free the CPU usage as your not playing game... (tbh im not sure about that... but it does happen valve or not)

i think they do this because when you alt+tab windows does not minimize the window and therefore does not change the process/thread prioritys (at OS/Kernel level) in the same way.

min and maxing a window is a lot diferent to just alt+tabbing it and bringing another window into focus

when you minimize a window in windows (/sigh) it dumps all the un-needed memory and also cuts the CPU priority.... thinking about it, that probably is what crashes it .. . . . . . ?

if that is whats crashing it then its

1) nothing to do with hardware
2) part of windows!

tbh you should explain your last post some more