Upgrading from Windows Vista Premium to Windows 7 as a student for £30 is a great deal. When you upgrade to Windows 7, you typically have two options: 1. Upgrade Install: This option allows you to keep your files, settings, and programs. It essentially replaces the operating system files of Windows Vista with those of Windows 7 while preserving your existing data and applications. 2. Clean Install: In a clean install, you start fresh with a new installation of Windows 7. This means you won't keep any of your applications, settings, or files from Windows Vista. It's like starting from scratch. In most cases, when you buy an upgrade version of Windows, you can choose whether to do an upgrade install or a clean install. The key point to consider is that in order to perform a clean install with an upgrade version of Windows, you usually need to have a valid license for a previous version of Windows (in your case, Windows Vista Premium). Here's how it usually works: 1. Upgrade Install Process: - Insert the Windows 7 upgrade disc. - Follow the on-screen instructions and choose the upgrade option. - Your Windows Vista installation will be upgraded to Windows 7 while keeping your files, settings, and applications. 2. Clean Install Process: - Insert the Windows 7 upgrade disc. - During the installation process, you might be asked to enter your Windows Vista product key. - After entering the key, choose the "Custom" installation option to perform a clean install. For the clean install to work with an upgrade version, the Windows 7 installation might ask you to insert the original Windows Vista installation disc or show proof of owning a valid Windows Vista license. To sum it up, you should be able to do a clean install with the upgrade version of Windows 7 for the same price. Just make sure you have your Windows Vista product key handy during the installation process to validate the upgrade.