Hp Pavilion dv6 1210-sa help?

Now the problem is i have a laptop Hp Pavilion dv6 1210-sa.specs here: http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01787636&tmp_task=prodinfoCategory&cc=us&dlc=en&lc=en&product=3976066 and i mostly use it for gaming and Movies.I have changed to win 7 64-bit.now the problem is that whenever my processor power management is at maximum at 100% my laptop freezes when playin games and rarely when seeing a movie.i have tried getting the bios batery out (i read that on another page) still nothing can yo help me plz.i have a cooler and i use it always.i ve had some problems with my laptop charger but i have fixed it and there has not been a problem do you think tha charger has to do with it.(p.s i use my laptop without the battery)