I got a Microsoft Windows 8 Professional 32/64-bit key from using MSDNAA/DreamSpark. Since I have to use the schools software to do exams and it only supports 32 bit, I have to use the 32 bit version to take exams. I also want to use the 64 bit version so I could make use of my 6GB of RAM. But DreamSpark provides just one key for both version. Can I use that one for both?