1.    14 Apr 2016 #1
    Join Date : Sep 2015
    Posts : 16
    windows 8

    Windows 10 upgrade is full clean installation ?

    I had windows 8.1 pro original dvd installed on my system.
    Then I upgraded free to windows 10.
    Now I want to make a new clean installation of windows 10 without keeping old files and directories and apps on c:\

    So I downloaded the Microsoft windows 10 media creation tool.
    Running it and I selected not to upgrade but : Create installation media for another PC
    Now it's downloading the windows 10 and in the end I will create a bootable installation on my flash drive disk on key.

    My question is if I will need a serial number/key when installing the windows 10 ?
    My goal is to install a new clean windows 10 even with formatting c:\ or even delete and create new partition on c:\ but the idea is to install new clean windows 10.
      My System SpecsSystem Spec

  2.    14 Apr 2016 #2
    Join Date : Nov 2015
    Posts : 4,766
    windows 10 Home threshold2

    You will NOT need product key at all. Even in Clean install.

    You already have Windows 10 installed and activated. Yes ?
    If so, you are "digital entitled ".
    You can reinstall the same Win 10 edition in the same computer as often as you want and anytime you want.
    Activation will be automatic.

    During the Clean Install, if you are asked to enter the product key, just click the SKIP ( or the "I do not have a product key" ) option and continue.
    Activation will be automatic.
      My System SpecsSystem Spec

  3.    14 Apr 2016 #3
    Join Date : Apr 2016
    Iowa, USA
    Posts : 662
    Windows 10 1607 Pro x64 (Anniversary Update)

    You can just go into Settings and then go to System... then reinstall Windows 10 from there. Or Refresh, which if you know there is a problem with Windows, you can refresh which reinstalls everything as if you bought it from the store or built, but keeps your files, just removes the programs you installed.
      My System SpecsSystem Spec

  4.    15 Apr 2016 #4
    Join Date : Dec 2013
    Sydney, Nova Scotia, Canada
    Posts : 7,609
    Windows 10 IoT

    If that original 8.1 Pro was a factory OEM install, windows 10 will read the OEM key from the BIOS automatically. You won't be prompted to select Home or Pro or be asked for a key. And It will activate with the original digital entitlement.

    If that 8.1 Pro install was from a Retail DVD, you'll be asked to select Home or Pro. Select Pro and do a skip when asked for a key. It will activate with the original digital entitlement. You could enter your 8.1 Pro key if you wanted, but why bother, if you don't have to.
      My System SpecsSystem Spec

  5.    15 Apr 2016 #5
    Join Date : Jul 2015
    PA, USA
    Posts : 460
    Windows 10 Pro (Mix of Builds) / Linux Mint

    The OP has win 10 installed thru upgrade and is activated, now wants a clean install without his files.

    Won't backing up files, and then doing a reset of his PC without saving anything accomplish this in the easiest manner?
      My System SpecsSystem Spec

  6.    15 Apr 2016 #6
    Join Date : Dec 2013
    Sydney, Nova Scotia, Canada
    Posts : 7,609
    Windows 10 IoT

    Depends on what your definition of a "clean install" is, and how clean you want the install. A reset won't remove any factory recovery partitions etc, if there are some. Sounds like the OP wants to wipe everything and start over fresh to me. The main question, I believe, was about needing the key or not?
      My System SpecsSystem Spec


Similar Threads
Thread Forum
Solved Best way to Have a Clean Installation on a new Windows 10 tablet
Hi everybody! I recently got a great deal on an HP Pavilion X2 10- 2 in 1 that came with Windows 10. As it is a secondary computer and going to replace an Android tablet as my primary portable solution, I'm trying to achieve the max. amount of free...
Installation and Setup
Solved Windows 10 Pro clean installation
Hi, I am trying to do a clean install of Windows 10 Pro. I downloaded the Windows 10 Media Creations Tool. When choosing 'Create installation media for another PC' it doesn't give me the option to choose the Windows 10 Pro edition. It just says...
Installation and Setup
Solved How do I ensure a full backup prior to installation
I want to do a full backup of my drive "C" in the event I have to recover. I'm running Windows 7 Home now. I have a number of apps on it from both Microsoft and Adobe, and I can't afford to loose them if the upgrade to Windows 10 goes bad. Are...
Installation and Setup
Solved Some questions regarding clean installation of Windows 10
I have looked at this guide: Windows 10 - Clean Install - Windows 10 Forums But I am still a bit confused regarding the part to choose "where you want to install Windows 10" When at the screen showing you the different hard drive partitions, I...
Installation and Setup
Solved How to find the key after the upgrade for a clean installation later?
Microsoft said a clean install of Windows 10 can happen. How do you find the key? Do you have to use a key finder after the upgrade or will Microsoft make it easily available?
General Support
Our Sites
Site Links
About Us
Windows 10 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 10" and related materials are trademarks of Microsoft Corp.

© Designer Media Ltd
All times are GMT -5. The time now is 03:56.
Find Us
Twitter Facebook Google+

Windows 10 Forums