Please help?

[jdancu90]

I had my macbook pro with OS Mountain Lion as for being a developer just to have iOS 8 early lol and im learning how to program last night my computer crashed and I had to reinstall operating system when I put my old CD it says

PS: I installed the new beta Yosemite I had this problem before but forgot how to fix it with same OS 10.10

 

[jdancu90]

pics

pics

 

[poiihy]

Maybe you have bad ram
Do a memory test with memtest86

 

[jdancu90]

Nope my memory is good tested it with drive genius i also bought new hard drive it wont let me like downgrade i fixed it before but forgot