Hey ppl , i have strange problem. I changed my stock cooler ( i5 7400 cpu ) and mounted Antec a40 cooler. Now when my case is in horizontal position PC work fine, but when i put it in normal ( vertical ) position it wont work. If system is up then i get Blue screen with Bad Pool Header error and i need to shut down PC and i cant turn it on after that . I can turn it on only in horizontal position and PC work normal. I tried with pulling all components out and puting it back again but same thing happen . Only thing i didnt do is pulling battery out of motherboard....Any have any idea what can cause this. Tnx in advice