computer problems.....AGAIN! Options

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wow.
iam so sick of my computer well thanks to those who helped me out in my last techinal issue i got rid of that problem now its a anthor problem.


First:
after i solved my "siren issue" my computer was running normally until yesterday i kept getting blue screens, i would be playing a game or going online or doing anything and i would at random get blue screens saying different things


Second:
i went thru all these techinal crap, but it still kept getting blue screens. i called techinal service hotline or somthing and they said the problem sounds like your CPU . i bought these computer from a friend who just bought it lol so i know the CPU was good it is brand new . i went into my bios setting or whateva i say a lot of things set up differently . but i dont know much about bios except how to disable things from coming up . i called someone to take a look at it and they looked and my bios and said "WOW. IAM SUPRISED YOUR COMPUTER DONT BLOW UP" he said my CPU frequency settings were all off . but for some reason he couldnt set it right, so he just set it at a low setting . my computer is still doing the same thing . but i dont know what it is !! is it settings or my computer.


Third:
i noticed now that its getting blue screens before it even loads up windows but you can see the screen for like 1 sec then it restarts and when it restarts it like freezes or somthing its werid. right now it have it shut off .

Thanks for reading hopefully someone can help me before i go out and buy anthor computer which i dont wanna do