If you're thinking of upgrading to Windows 8 for either the new touch-friendly UI or other features, you're probably wondering whether you'll be able to do an in-place upgrade to keep you existing settings, files, and applications. ZDNet has the scoop on upgrading to Windows 8 from older versions.
The information comes reportedly comes from Microsoft partners. Basically, Windows 7 users will be able to do an in-place upgrade to Windows 8, Windows 8 Pro, or Windows 8 Enterprise. The version of Windows 7 you're using will determine which version of Windows 8 you can upgrade to--for example, Windows 7 Professional and Windows 7 Ultimate as well as the entry-level consumer versions of Windows 7 can upgrade to Windows 8 Pro, but not downgrade to the basic Windows 8 version.
Windows Vista users can also upgrade to Windows 8, but it looks like applications won't be maintained and if you want to preserve system settings, you'll need SP1 installed on Vista.
Windows XP with SP3 can maintain their personal files, but not system settings or applications.
Learn more: 8 Things to Know About Windows 8