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  1.    30 May 2015 #1
    Join Date : May 2015
    Posts : 4
    Windows 10 Build 10074

    How do I A) Get rid of Grub and B) go back to Windows 8.1


    Hi, I'm in a bit of a unique situation at the moment. I have grub because I required linux for about a month and decided to use it to dual boot it with Windows 10. I deleted linux, but I still have grub. I also (unknowingly) deleted my backup of Windows 8 from my laptop, so right now I'm just on Windows 10. I do not have the sticker under my laptop that has my product key (I'm not even sure I had one of those stickers), so what am I to do if I wanted to 1) remove grub, and 2) go back to Windows 8.

    Also, if I can't go back to windows 8, will I at least be able to upgrade to Windows 10 for free through their upgrade program? Thanks for any answers you can provide, I really messed up here.

    Edit: The reason I want to get rid of GRUB is that it makes upgrading the builds a huge hassle (having to be around when the system restarts)
      My ComputerSystem Spec
  2.    30 May 2015 #2
    Join Date : Jan 2015
    Posts : 382
    Windows 10

    The only way back to Windows 8.1 is a clean reinstall. Your computer has a SLC table (the Key is imbedded in the motherboard), meaning that you will have to go through several steps to get reinstallation media. I think asking on the eightforums would be your best bet as the only solutions I can find require a retail key or a working Windows 8.1 partition.
      My ComputerSystem Spec
  3.    30 May 2015 #3
    Join Date : May 2015
    Posts : 4
    Windows 10 Build 10074
    Thread Starter

    Thank you, I will find these forums!
      My ComputerSystem Spec
  4.    31 May 2015 #4
    Join Date : Jul 2014
    San Jose, California
    Posts : 2,052
    Ubuntu14.04x64 MintMate17x64 Win10Prox64

    You can try:
    1. Download Visual BCD Editor - Windows 8|7|Vista
    2. Install then run. You'll get an error message, just ignore it.
    3. Follow the screen shot
      Click image for larger version. 

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    4. Win+R->msconfig and look under boot tab. It should be only Windows 10 listed. If not delete the other entry.


    It is impossible to go back to Windows 8 since you don't have a backup image but you might have the factory recovery image. However, I am not sure if you can recover from it because when you install Linux, Windows 10, the boot manager is probably got messed up.

    In order to re-install Windows 8, you will have to download the correct edition of Windows 8 that you previously had so the key from BIOS can be used to activate Windows 8.
    Create installation media for Windows 8.1 - Windows Help
      My ComputerSystem Spec
  5.    31 May 2015 #5
    Join Date : May 2015
    Posts : 4
    Windows 10 Build 10074
    Thread Starter

    Thank you for the help! GRUB is now gone. I will try the Windows 8 solution tomorrow, thank you!
      My ComputerSystem Spec
  6.    31 May 2015 #6
    Join Date : Jul 2014
    San Jose, California
    Posts : 2,052
    Ubuntu14.04x64 MintMate17x64 Win10Prox64

    You're welcome and thanks for reporting back.
      My ComputerSystem Spec
  7.    31 May 2015 #7
    Join Date : Jan 2015
    Posts : 382
    Windows 10

    To be honest, I'm pretty sure that doing a clean reinstall (deleting all partitions) will also clear GRUB
      My ComputerSystem Spec
  8.    31 May 2015 #8
    Join Date : Mar 2014
    Cape Breton Nova Scotia ,Canada
    Posts : 3,452
    insider build 10586.3 win10 pro 64

    I once duel booted with win10 a Linux and used grub ,I simply formatter the Linux partition and then ran the win10 bootup repair and it fixed it for me without and issues with win10 after the repair
      My ComputerSystem Spec
  9.    31 May 2015 #9
    Join Date : Jul 2014
    San Jose, California
    Posts : 2,052
    Ubuntu14.04x64 MintMate17x64 Win10Prox64

    There's no doubt that if you delete the partition and re-installl Windows then you would not have to do anything. The procedure I gave above just to answer his first question.
      My ComputerSystem Spec
  10.    31 May 2015 #10
    Join Date : Mar 2014
    Cape Breton Nova Scotia ,Canada
    Posts : 3,452
    insider build 10586.3 win10 pro 64

    Quote Originally Posted by topgundcp View Post
    There's no doubt that if you delete the partition and re-installl Windows then you would not have to do anything. The procedure I gave above just to answer his first question.
    not sure if you are commenting on my previous post but if you are I did not reinstall windows ,I just ran the boot /startup repair to fix the mbr
      My ComputerSystem Spec

 
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