Windows 8 and 8.1 Forums


Windows 8.1 Final - installation

  1. #1


    Norway
    Posts : 25
    Windows 8.1 PRO 64bit

    Windows 8.1 Final - installation


    Hi,

    Excuse me if this is the wrong place for the post, but was best suitable for me in the morning.

    When I upgraded from Windows 8 Final to Windows 8.1 Preview, it removed my UEFI Windows 8 Installation. To my knowledge, it also changes the MBR on the harddrive. After 5-10 minutes of panick attacks and such I fixed the issue in my BIOS, with some config changes.

    My question is, since MS will not yet release ISO of Windows 8.1, but trough the Store, will this happen again?

    UEFI boot and the posibillity to have this on Windows 8 is one of the reason why I left Windows 7. But if I can't with 8.1 it's really sad.

    Regards

      My System SpecsSystem Spec

  2. #2


    Posts : 12
    Windows 7/8


    Hi kaieivindm,

    As its name implies Windows 8 Final is a finished version ( barring subsequent updates of course ) whereas Windows 8.1 Preview is a test, or Beta, version which can contain bugs and errors. As such you should never upgrade from a production to a test OS:

    [FAQ] Things to Know Before Downloading or Installing Windows 8.1 Preview - Tweaking with Vishal

    Once 8.1 has been finalised it will be released through the Apps Store and, most probably, as a Windows update:

    Windows 8.1 to be released officially on October 17 | Ghacks

    Assuming you have recovered your W8 Final version then you simply need to wait until October to upgrade to the final version of 8.1.

    Hope that helps.

    John
      My System SpecsSystem Spec

  3. #3


    Norway
    Posts : 25
    Windows 8.1 PRO 64bit


    Quote Originally Posted by cloggyjohn View Post
    Hi kaieivindm,

    As its name implies Windows 8 Final is a finished version ( barring subsequent updates of course ) whereas Windows 8.1 Preview is a test, or Beta, version which can contain bugs and errors. As such you should never upgrade from a production to a test OS:

    [FAQ] Things to Know Before Downloading or Installing Windows 8.1 Preview - Tweaking with Vishal

    Once 8.1 has been finalised it will be released through the Apps Store and, most probably, as a Windows update:

    Windows 8.1 to be released officially on October 17 | Ghacks

    Assuming you have recovered your W8 Final version then you simply need to wait until October to upgrade to the final version of 8.1.

    Hope that helps.

    John

    Thanks for the reply, but I don't quite see how that helped

    I do understand that Windows 8.1 is preview and beta, and not final version. I was fully aware of that during installation.
    But changing something crucial as MBR on a harddrive is really serious. Beta/Preview or Final.
    I can't be the only one that has experienced this.

    Hence my question.

    As of now, the only way to aviod the issue is to wait until the Windows 8.1 ISO is available, and do a new install via USB/DVD, as I see it.
      My System SpecsSystem Spec

  4. #4


    Posts : 12
    Windows 7/8


    Guess I misunderstood your problem but, if you have recovered you W8 Final, with its EUFI support, then I don't see why you'd want to do a new install of 8.1 instead of an update. I've read about EUFI but have no practical experience of it, both machines I'm running 8 / 8.1 on don't support it. Sorry I can't help you, hope someone else can.

    Cheers,

    John
      My System SpecsSystem Spec

  5. #5


    Orbiting the Moon
    Posts : 2,975
    Windows 10 x64


    Hello kaieivindm,
    I'm using it for the sake of UEFI as well.

    The first OS 8.0 was already installed in UEFI (if that's enabled in the BIOS in the first place before installing, your're safe).

    Then the Store upgrade keeps everything including partitions and so: UEFI too.
      My System SpecsSystem Spec

  6. #6


    Posts : 5,592
    ME, XP,Vista,Win7,Win8,Win8.1


    UEFI boot and the posibillity to have this on Windows 8 is one of the reason why I left Windows 7. But if I can't with 8.1 it's really sad.
    You can install Vista x64, Windows 7 x64 & Windows 8/8.1 x64 in UEFI mode.
      My System SpecsSystem Spec

  7. #7


    Norway
    Posts : 25
    Windows 8.1 PRO 64bit


    Yes, it's true that W7 and Vista in x64 can be used for UEFI, but the super fast boot will still only be for Windows 8.

    Windows 8 was installed on UEFI, and my boot time was about 5.8 seconds. Then after I installed Windows 8.1 Preview, the boot time increased to 15.0 seconds, thats quite the harsh decrease. And no more UEFI boot available on the disk.

    So either Windows 8.1 preview did something to my MBR; and changed some settings, or else I am clueless of what has happend to my computer.
      My System SpecsSystem Spec

  8. #8


    Orbiting the Moon
    Posts : 2,975
    Windows 10 x64


    UEFI doesn't increase boot speed that much: it's Hybrid Boot that is enabled (on Win6 and Win7 it doesn't exist).

    Even on MBR (tested on Pentium 3 PC) with IDE disks: just 10 seconds boot, because of the Hybrid boot is on.

    If the feature is disabled or if you restart, then you get a slower startup.
      My System SpecsSystem Spec

  9. #9


    Posts : 1,121
    Windows 8.1 x64


    Quote Originally Posted by kaieivindm View Post
    When I upgraded from Windows 8 Final to Windows 8.1 Preview, it removed my UEFI Windows 8 Installation. To my knowledge, it also changes the MBR on the harddrive.
    Us knowing exactly how you did the upgrade might help us understand the situation, but for the update to change your system to MBR, it would have had to reconfigure the Hard Drive. It could not do that unless all the prior partitions had been removed from the drive, which you would have to choose to do.

    If you got the UEFI back by changing some bios settings, perhaps you just lost the Windows Boot Manager which is associated with a UEFI install. Or another hard drive was involved in the install process.

    If you feel like it, you might attach a snipping tool picture of your Disk Management window using the paperclip on the advanced replies. Maybe that would clear up the situation.
      My System SpecsSystem Spec

  10. #10


    If you need the 8.1 Preview ISO, get it here:

    Windows 8.1 Preview ISO files - Microsoft Windows
      My System SpecsSystem Spec

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