Can I install a 64 bit Windows 7 on a computer that currently has a 32 bit version of Vista? I think that my hardware can handle a 64 bit Operating System. I tried to install a 64 bit version of Windows 7 but the installation program checked my current Operating System and stopped. Is there any way to override this? How can I make sure my hardware can handle the 64 bit OS? (I build this computer from scratch) I do not think this will delete my hard drive. Will it?