1.    19 Aug 2015 #1
    Join Date : Nov 2014
    Posts : 32
    Win 8.1 and Win 10

    Win 10 no active partition

    I have done a clean install of Windows 10 having cleaned my hdd and set it as unallocated. After installation diskmgr shows the following partitions:-
    450MB Healthy (Recovery partition)
    100MB (EFI System partition)
    465GB (C Healthy (Boot, Page File, Crash Dump, Primary partition)

    None are shown as Active. Diskpart - detail partition doesn't show either partition as active. Is this normal?

      My ComputerSystem Spec
  2.    19 Aug 2015 #2
    Join Date : Oct 2014
    New Jersey
    Posts : 1,448
    Windows 7 Pro x64 Windows 10 Pro x64

    Post a full shot of Disk Management.
      My ComputersSystem Spec
  3.    19 Aug 2015 #3
    Join Date : Jun 2015
    Posts : 1,929
    Windows 3.1 to Windows 10

    Yes,, because 100MB (EFI System partition) is the active partition

    there is also another small partition that you do not see - 16MB MSReserved
      My ComputerSystem Spec
  4.    19 Aug 2015 #4
    Join Date : Oct 2014
    Posts : 107
    Windows 10

    Quote Originally Posted by KeithR View Post
    None are shown as Active. Diskpart - detail partition doesn't show either partition as active. Is this normal?

    Windows 8/8.1 OEM (Original Equipment Manufacturer) computers and the new motherboards have UEFI firmware, but the UEFI firmware include a Compatibility Support Module (CSM) that is set up to use the legacy version of BIOS.

    The UEFI firmware supports two boot modes: UEFI Boot Mode and Legacy BIOS Boot Mode.

    In UEFI Boot Mode, the UEFI firmware scan your computer's hard disks for existence of the EFI System partition, then run \efi\boot\bootx64.efi file in the EFI System partition.

    UEFI Boot Mode do not use boot sectors on the hard drive (and the USB flash drive) and do not require active partition to be set.

    Here is more info: link
      My ComputerSystem Spec
  5.    20 Aug 2015 #5
    Join Date : Nov 2014
    Posts : 32
    Win 8.1 and Win 10
    Thread Starter

    Thanks all. I was a bit concerned because I had seen screen shots of diskmgr showing the system partition as active. That's not the case with mine. But if the partition is recognised as active during the boot process, that is all that matters. My pc boots and runs well so I will not try to mend it!
    Thanks to all for your responses.
      My ComputerSystem Spec


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