Installing Windows Vista: setup procedure The setup procedure of Windows Vista is easy. After booting the computer from the bootable DVD, you are asked for confirmation to boot from the Windows Vista DVD. For an upgrade to Windows Vista, the setup can also be run in a Windows XP environment (an upgrade installation). Windows Vista will be installed next to the current XP installation (before starting this procedure, remove the currently installed security software!). After the setup of Windows Vista has completed, programs, settings and personal data will be transferred automatically to the new operating system and the old system files will be moved to the folder Windows.old. A clean installation is the best option! An upgrade installation will probably run without any problems, but it's not the best way to install Windows Vista. An upgrade installation can possibly result in installation errors, a clean install (where Windows Vista is installed on an empty C: partition) probably won't. That's one of the reasons why a clean installation is preferred above an upgrade installation. Multiboot system For realizing a multiboot system, it is necessary to create multiple primary partitions, one for each operating system (in combination with a boot manager). Make sure you created a back-up of your personal data, hide the currently installed operating systems and remove an earlier installed boot manager before starting the setup of Windows Vista .