Hello, I was trying to install window 64 bit window on my window 7 32 OS but it would not let me. I understand you can not transfer files to 64 bit from 32 bit. However it is not giving me the option to clean install? I get this error at start up - This verison of this file is not compatible with verison of windows you're running. Check your computer's system information to see wheater you need an x86(32 bit) or x64 (64-bit) verison of the program, and then contact the software publisher.