How to Clean Install Windows 8 from Pro Update Pack

By  · Thursday, Nov 8, 2012 0 Comments

Microsoft is offering Windows 8 Professional upgrade for $15 only if you have a PC with windows 7 that was bought after June 2nd. But the question has been asked widely over the internet that can you re-install windows 8 from this upgrade pack directly or you should install windows 7 first and then upgrade it to windows 7?

Well answer to this question is simply, yes! You can re-install windows 8 from the upgrade package without having to install windows 7 first. For this you can adopt several methods to make your windows 8 installation source.

You can either use a built-in Windows 8 utility to create your own recovery media from where you can recover your windows 8 at later stage. This recovery media can be optical or USB storage. To make windows 8 recovery disk, on the Start Screen, search for recovery. Under Settings, there is a desktop utility called “Create a recovery drive”.

Note that this recovery media is the Windows Pre-installation Environment (Windows PE). It’s an advanced boot feature that allows users to boot into the PE to recover Windows. It does need either a system image or a recovery partition to work.

If you create a system image using the Windows backup utility, you can use that in conjunction with the recovery drive to do a complete Windows installation.

Creating ISO with Update Pack:

You can also create windows 8 ISO with Microsoft Update Pack. The update pack will create an ISO and tell you how to burn it to a DVD or Flash Drive.

How to do a Fresh Install:

If you want to do a fresh install of windows 8 without recovering your old settings, you can go to settings in the recovery and there you will see an option  to refresh either with user settings/files or without. Simply choose to refresh without these settings and it will be just like fresh install. Or you can simply install your windows 8 from the ISO created above just like you are familiar with the installation of windows 8.

Activating Windows 8 after Fresh Install:

Note that you can clean install windows 8 with your product key but it will not allow you activate, rather an error will be shown like this:

To solve this error, follow these steps:

  • Open regedit by pressing Windows-q, entering regedit.
  • Navigate to HKEY_LOCAL_MACHINE/Software/Microsoft/Windows/CurrentVersion/Setup/OOBE/
  • Change MediaBootInstall from 1 to 0
  • Go back to the start screen and enter cmd there.
  • Right-click Command Prompt and select to run it as administrator.
  • Type slmgr /rearm on the command line and hit enter.
  • Reboot Windows now.

Run the activation utility afterwards, enter your product key to activate Windows 8 and everything will be fine now.

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