Not surprisingly, the release of Windows 8 has been accompanied by an avalanche of questions related to upgrading. And here’s a classic question: You’re running a 32-bit version of Windows XP, Vista, or 7, but you want to upgrade to a 64-bit version of Windows 8. How does that work?
If you’re familiar with the Windows 8 Upgrade Advisor, Microsoft’s web-based installer for Windows 8, you know that you can trigger this new, electronic install type by visiting the windows.com web site with a web browser from a previous Windows version. And from there, you can upgrade your existing Windows version to Windows 8 Pro. Or you can perform a clean install: Please refer to Clean Install Windows 8 with Upgrade Media for details.
Here are the big questions around this type of upgrade.