Question: I have to run Mac OS on virtual box for a class and it keeps giving me errors stating 

"VT-x/AMD-V hardware acceleration not available on your system. Certain guests (e.g. OS/2 and QNX) require this feature and will fail to boot without it."

If there is a solution, I am not used to windows 8.1 and will need detailed instructions on how to fix it. Thank you

Answer: 
For anyone else who may look this up in future. I had the same problem. Turns out virtualization had been disabled in the bios. Check if this is the case. If so, just enable it and the error is gone
As previous replies have said, check if your processor supports VT-x virtualization. If it doesn't, then you just won't be able to run Mac OS on VirtualBox. If that is the case, consider VMWare Player, which is a decent alternative for VirtualBox, and is also free. It is commonly used in computers whose processors don't support VT-x to emulate Mac OS.