I want to install Windows-7 on a recent Mac Book Pro. I have a Windows-7 (32-bit) installation disc that I plan to use for the installation, using Bootcamp. However, I'm also thinking about getting a 64 bits version of the OS installation disc in a near future, because it is said to make a better use of the hardware.
If I install Windows-7 (32-bit) today and start to work with it, will I be able to upgrade to Windows-7 (64-bit) later ? when upgrading, is there a risk I could lose my previous work ?