Upgrading from %1 to any edition of Windows Server Technical Preview 2 is not supported. You can choose to install a new ...

Upgrading from %1 to any edition of Windows Server Technical Preview 2 is not supported. You can choose to install a new copy of %2 instead, but this is different from an upgrade, and does not keep your files, settings, and programs. You'll need to reinstall any programs using the original installation discs or files. To save your files before installing Windows, back them up to an external location such as a CD, DVD, or external hard drive. To install a new copy of %3, click the Back button in the upper left-hand corner, and select "Custom (advanced)".