That freezes is not only on my pc. Here are many threads about the same issue. That freezes are spontaneously, without any system, when I browsing internet, playing games, listening to music, etc.
PS. My OS is Win7 x64, maybe problem in this ?

I clean installed the nVidia driver set 340.52 that was released 2 days ago.
I have no problems, I tested some of my graphic intensive games without a issue.
I also agree, maybe you need to refresh/reinstall your O/S!
I do a O/S refresh/reinstall, like every six months or so.

Just wrote:
Hi,
Officially, last VGA drivers on site have version V9.18.13.1100.02 and were released 2013/02/20. But after that Nvidia has released A LOT of updates. But when I install some of that drivers my laptop freezes (here are many threads about that).
Need for speed rivals doesn't even start with V9.18.13.1100.02 drivers and show error about old drivers.
So, why ASUS doesn't support new drivers for TOP line of notebooks ??

Not sure how important this is, but I remember more people complaining about this on the G75VX model which I'm guessing you have, instead of the G75VW model which Clintlgm and GottiBoi55 have, so you may want to tell us your full G75 model name just to make sure we are all talking about the same notebook model? If you have the G75VX model, hopefully we can get more suggestions/solutions from those members if the G75VW members aren't able to figure it out. Thanks!

Edit: FYI. Just checked the ASUS download site and both G75VW and G75VX models have the VGA driver V9.18.13.1100.02 posted if this means anything.