When upgrading from Windows Vista to Windows 7 or 8, get a setup disk for the desired Windows operating system. Each operating system has certain device requirements that are critical before installing.
Installing Windows 8 or 7 from Windows Vista is done in three different ways depending on certain circumstances. First, there is a clean install option. In this case, it is as if the computer is new. It does not retain any files, and it gives a fresh Windows without any documents or files from the previous Windows.
Secondly, there is the in-place upgrade. When installed in this manner, the upgrade retains the majority of the previous settings and applications. It also retains all documents together with the data files. This option may not be available in all devices.
Finally, there is the migration setup. This allows backing up settings before performing a clean install. After the reinstallation of the Windows, it reapplies the settings or data backed up from the hard drive.
Sometimes the choices selected appear during the setup page after accepting the end user license agreement. The choices are either to keep settings and personal files, keep personal files only or retain nothing. Windows recommends installing genuine software.