|Microsoft Windows 7 Upgrade and Installation|
|Articles - Featured Guides|
|Written by Nate Swetland - Edited by Olin Coles|
|Tuesday, 10 November 2009|
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Best Practice: Clean Install
A clean install is a install method where you completely wipe the previous operating system and start over from scratch. There are a couple reasons why you would want to do this: The first reason is that you purchased a built or purchased new machine with no operating system, and want to get it up and running. Another reason for a clean install is if you want to just get rid of all your trash and start fresh. A third reason for a clean install would be if you currently use Windows XP/2000/Me/98.
Two of the choices you have for purchase for a clean install is the Retail and OEM version. OEM is a one-time shot, where you install it on one machine, and it stays with that machine and cannot be transferred to a new machine or another person. Retail is the version where you can install it as many times as you like, but can only have one copy activated on one machine at any given time. OEM is more expensive than an upgrade, but not as expensive as Retail. You can upgrade with an OEM or Retail disk, but it would be silly to spend the extra money for a standalone version if you were just going to do an upgrade. Unless you later plan on wiping the system and don't want to go through the trouble of installing the previous OS, and then Windows 7. There is a way around that, but we will discuss that later.
Here is what the first step of Windows 7 Professional installation looks like.
This is the screen where you decide whether you want to do an upgrade, or a custom install. If you want a clean install, you would choose custom.
EDITOR'S NOTE: At the time of this writing, NewEgg offered the following Microsoft Windows 7 Operating System choices for clean installation: