BSOD help! Win7 x64

Been having some BSOD issues lately, im able to identify the causes but have no clue how to fix, have searched the internet myself but i was hoping someone here could help me, thanks in advance.

Here is a screenshot i think may be useful, some more info on stuff i guess, i don't really understand it but. http://gyazo.com/f23f0b053de4355452364437e5371099

So as shown one of the problems is caused by: atikmdag.sys (Something to do with my GPU)
The second problem is: ntoskrnl:exe (Something from windows i think, not sure how to fix this)
3rd one shown, new problem: dxgmms1.sys

I have all latest drivers to my knowledge, checked through device manager aswell.
Not sure if its updates being needed or i need to delete things (didnt want to delete things without confirmation it wont harm my pc)

I have been messing around with overclocking my gpu recently although it seems stable to me, not sure if thats needed info but everything i can tell should help.
Win 7 x64
Sapphire 7850
Corsair 750w
8gb ram
AMD FX-6100
Motherboard (Model): M5A78L-M/USB3 (AM3R2)

Thanks, any help appreciated.
Note: i want to avoid having to restore windows