Windows 10: Dual Boot System - RTM Partition No Longer Available

Discus and support Dual Boot System - RTM Partition No Longer Available in Windows 10 Installation and Upgrade to solve the problem; I created a dual boot system quite some time ago and all was well until . . . RTM partition was completely up-to-date. I had recently updated to... Discussion in 'Windows 10 Installation and Upgrade' started by Wynona, Feb 6, 2016.

  1. Wynona Win User

    Dual Boot System - RTM Partition No Longer Available


    I created a dual boot system quite some time ago and all was well until . . .

    RTM partition was completely up-to-date. I had recently updated to Windows 10 Build 10251 on the Insider partition.

    I turned the machine off on Sunday January 31, left town, and returned Saturday February 6. All was well with the dual boot when I turned the system off before leaving. When I turned the system on last night, it booted directly into the Insider Partition. There seems to be no option to boot into the RTM partition.

    Help!

    :)
     
    Wynona, Feb 6, 2016
    #1

  2. How do I restore dual boot capability after Windows 10 clean install removed it

    My computer was dual-boot with Windows 7 boot partitions on two separate drives. After upgrading to Windows 10, the dual boot provision worked fine. However after a clean install of Windows 10, dual-boot capability is no longer available. The boot partition
    for the remaining Windows 7 syBistem is intact. Only the dual boot option is gone.

    I tried the changing the default operating system under System Properties/Advanced/Startup and Recovery, but the only choice is Windows 10. Windows 7 isn't a option. I'm guessing that the clean Windows 10 install wiped out access to the dual-boot menu.

    Thanks.

    Bill
     
    B_Phillips, Feb 6, 2016
    #2
  3. Dual boot Windows 10 and Windows 7 by cloning Windows 7 to new HDD

    Old title: Dual boot Win 10 and Win 7

    Have Win 10 on SSD C:\ and a failing HDD with Win 7 and some programs I don't want to lose. I have a new HDD to use to create a dual boot. Media for Win 7 is no longer available. How do I clone the failing disk into a bootable partition on the new HDD?
     
    DavidSchott263, Feb 6, 2016
    #3
  4. Private Win User

    Dual Boot System - RTM Partition No Longer Available

    Does the RTM partition still exist? If it does, IMO, it's only missing from boot manager.
     
    Private, Feb 6, 2016
    #4
  5. Wynona Win User
    Yep, I checked and it's still there (D:\). And I know nothing about the boot manager. *Sad
     
    Wynona, Feb 6, 2016
    #5
  6. Private Win User
    Press Win+R, type in -> msconfig <- Enter. Click on Boot tab, does the RTM is listed there? If it does, look at the Timeout box, the reading should be 30 seconds.
     
    Private, Feb 6, 2016
    #6
  7. davidhk Win User
    msconfig method should fix the issue.

    Just to add..................
    Control Panel > Power Options > left side, Require password on wakeup > Change settings that are currently unavailable >scroll down, UN-check "Turn on fast boot startup" > Save changes.
     
    davidhk, Feb 6, 2016
    #7
  8. Wynona Win User

    Dual Boot System - RTM Partition No Longer Available

    Thanks, Private; that worked!

    Thanks, David. Private's solution worked. *Smile So, if I'm reading this correctly, fast boot could be the culprit? But, but, but, I like fast boot. *Smile
     
    Wynona, Feb 6, 2016
    #8
  9. Wynona Win User
    My next question would be, "Has anyone else with a dual boot system had this problem or is this one mine alone? Should I send feedback?"
     
    Wynona, Feb 6, 2016
    #9
  10. davidhk Win User
    No, you are not alone.
    I have seen a few threads related to that.
    Personally I had the same issue. I dual booted Win 10 and Linux and it rebooted to Linus automatically.
    msconfig is the solution.
    Also under msconfig > Boot > I would set the OS I use most Set as default.
     
    davidhk, Feb 6, 2016
    #10
  11. Wynona Win User
    Thanks, David! Feedback imminent! *Smile

    FWIW, for me, the most recent "installation" remains the default boot OS. Since RTM was the first installed, and I haven't clean installed it since the "November Release", each new build that's clean installed becomes the default; if I don't choose one or the other, the default boots.
     
    Wynona, Feb 6, 2016
    #11
  12. davidhk Win User
    Yes, the "latest" install becomes the default.
    That is why I mentioned about choosing which one you want as default. You might not want Insider build as default.
     
    davidhk, Feb 6, 2016
    #12
  13. Wynona Win User

    Dual Boot System - RTM Partition No Longer Available

    Yeah, I do want the Insider build. *Smile Reason being that I use it as a "daily" OS for the most part. All files are on an external drive.
     
    Wynona, Feb 6, 2016
    #13
  14. Private Win User
    At first I thought the otherwise. *Biggrin Glad it worked.

    You're welcome.
     
    Private, Apr 4, 2018
    #14
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Dual Boot System - RTM Partition No Longer Available

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