How to Install and Upgrade Windows 8
Not all editions of Windows 8 support the features required in the workplace, such as Group Policy or BitLocker.
No migration path exists between 32-bit a 64-bit Windows editions.
Windows 8 allows you to upgrade from Windows XP while keeping your files and folders intact.
The Application Compatibility Toolkit (ACT) can help you to determine the readiness of your software and hardware for Windows 8.
You can manually set compatibility for older software.
You can perform a clean installation of Windows 8, upgrade an existing installation, or migrate user data to a new Windows 8 computer.
Only an upgrade from Windows 7 will permit migration of installed desktop software.
You can create a custom or automated Windows 8 installation by downloading and installing the Windows 8 Assessment and Deployment Kit (ADK) onto a technician computer.
To automate much of the Windows 8 installation process, you can create an unattended answer file.
You can use SysPrep, the System Preparation tool, to customize a Windows 8 default installation before an installation image is captured.
You can use Windows To Go to provide users with mobile, USB-based Windows 8 installations.
The Windows 8 ADK includes tools to aid the automation of Windows 8 product activation.
You can migrate user accounts and files from one computer to another using either the Windows Easy Transfer tool or the User State Migration Tool (USMT).
The ScanState command offers many more configurability options than Windows Easy Transfer (but requires some knowledge of XML).
You can relocate user files to a server or central file store and still maintain access to them in Windows 8 libraries.