Display driver stopped responding (ATIKMDAG)

Hi all, i have recently bought a new Dell laptop but have been having a problem normally during gameplay, it can go for hours, sometimes seconds before the game backs out and crashes displaying the error 'Display driver has stopped responding and has recovered', it tells me this is relating to the driver ATIMDAG, i had the problem on the old and the newer drivers, i found this on here but im wanting some advice on if its safe or carry any risks:

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Hi Everybody,

I have had a running ticket with ATi for 2 weeks now and found the solution myself as they are useless. This is what I sent to them today from within my ticket! This works for me! (Also make sure you have enabled ACPI 2.0 support in BIOS not sure if it helps but best to be safe)

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"I have the solution for my problem. I strongly suggest you post this to anyone else having this problem! (PS I am using 7.5 catalyst)

I found that if you go into the system configuration utility (Start menu then type "system configuration" in the search bar) and the choose the boot tab and then to advanced options. There you will see at the top two boxes that you can check one is processor and the other is memory. If you check both of these and choose one processor and then the max amount of memory that is on your system. Hit apply and ok. Restart your system and it should run quickly in 2d and 3d works! Yay!"
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Thanks in advance!
Stew