Installed windows 8.1, Turbo Boost i7 caused whea uncorrectable error

Hi so i had to do a system restart because of a annoying automatic repair that happened because a bluescreen during log in.

Now i have installed windows 8.1 after restarting during first launch i got a blue screen then during second launch it work fine. during installation of my drivers from dells site i got a blue screen.... But manage to installed all of the drivers from dell... Got blue screen again but installed windows update nand after that it run for 1hr.

Then true *** began when blue screen whea uncorrectable error came up but this time during booting. it was so bad that even during automatic repair mode, if i tried a repair, or any option in there blue screen come, then after blue screen goes hardcore and doesn even want me to load anything or get automatic repair mode. I tried reinstalling windows butttt blue screen comes up before i had a chance to do anything.

After alot of searching i found someone on a forum mentioning of the overclock that can do this. I decided to restaur my bio to put everything back to default, Everything work fine and i because the over clock is off....

So my question is Why is my Turbo Boost with a factory overclock that i paid for ...not done on my own is causing my system to fail? The overclock never did that before i got my first problem before i restart. 

Since it was something i paid for is there i would like to fix this error. i have a i7 4960X that dell overclock for me to 4.3hgz. Is there a reason ? is there a way to fix that ?

Also my other question is if i id a restaur to default on my BIOS, what shut off that i must put back on again? I know the overclock is off the the setting are still there but thats all i know. Also i did do a restaure before installling windows a again so if something was not on please let me know.