quickie regarding nocd/back up cracks and stability issues

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Hmmmm its a bugger aint it lol. @ash2dust2 No the hardware between the PCs is different ie Geforce4 440mx 64MB DDR in one and a Radeon 32MB DDR in another as well as different motherboards ect. It could well be that i need to reformat the BAD PC as you suggested but i was hopeing that wouldnt be the case as the game will run ok with the original disks ? (Its something 4 me to bare in mind )
@ RINCE Ive read what you posted (obviously ) and im wondering about

). If you're not afraid of building pc's, maybe you could switch cases (and power supplies) and see if the problem goes with the power supply.

I have built both of the PCs i own" but i am by no means a cleaver geek who needs no help " If i change the power supplies over is this intended to see if the problem is "not enough power being sent to different components" and resulting in the problems i have mentioned ?. If thats the case then i would be wondering why both PCs play the games from the original disks or am i missing the point ? (i know its hard to belive but its possible). My first point of call is to make a image through clone and mount it with daemon tools i think. I cant belive i diddnt think of that myself expecialy when ive told countless others to do exactly that. If i still have the probs with PC number 2 and nocd/backup cd cracks then mabey it will pay to reformat my hard drive. Is it poss that i could of picked something up that would stop "SOME" cracks working even though i use virus protection?
Thanks ppl for the info