G73jh Asus laptop freezes every 15 minutes...

Hi.
I had my laptop for about a year and a half and I never had a issue with it. Recently, I bought battlefield 3 and updated the drivers for it to work. When that was done, I decided that it would be a good idea to clean out all the dust for everything to run nice and smooth... So I sprayed the laptop with the appropriate spray, plugged it back in and started playing. Ever since then, every time I start my laptop, it freezes after about 15 minutes of use and I need to shut it down manually. I tried to install the old drivers but with no luck... it still freezes... I have a friend that cleaned his laptop about 2 weeks ago and he had the same problem... does anyone know whats wrong and have a solution!?!?

Thx!
 
"So I sprayed the laptop with the appropriate spray"...

what was the appropriate spray, and where did you spray it? On the keyboard? In the fan vents?
 
spray

I don't remember the name of the spray (im not at home at the moment) but I got it at my local computer shop (pccyber)... and I srayed it the vents in the back and under it...
 
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