i have the same experience, mine is a brand new HP, latest model with pre installed windows7 installed.
i used it for only two weeks, then removed it due to frequent safe mode when i power on my laptop.
on the last day of that two weeks, i got virus already.
so i decided to get ubuntu linux.
ever since, i never got any laptop problem even hardware problem.
but first try to check also your computer components, it may not be compatible too.
if problem persist, get xp and dual boot it with linux.
when ready to leave windows, you can remove windows from your machine.