•  I have changed this SSD to "dynamic disk" https://superuser.com/a/1080796/1074900
  • merged the 70 GB Other NTFS partition to the 10 GB Unallocated space than restarted the machine than It says the following at boot: BOOTINGMR is missing press Ctrl+Alt+Del to restart
  • In the bios it does not offer my operation system's SSD as boot option (1st 2nd or 3rd) but it sees it in other settings. If I directly click on it to boot from it it just gives me the previous ERROR.
  • I have created a bootable windows 7 USB to do this. But It does not want to boot from that from the bios (I used Boot Camp Assistant for the bootable pendrive)


  • Windows 7 Professional
  • I have a min SSD that is separated to 4 areas
    • 100 MB area that was created by windows at installation
    • 100 GB Main System Partition NTFS
    • 70 GB Other Partition NTFS
    • 10 GB Unallocated partition
  • I want to add the Unallocated partition to the Main partition but in "Computer Managment" it grays out that option when I click on the main drive
  • I have tried with EaseUS but that also cant resize or extend the main partion. When I try to resize it it says there is 0 unallocated partition while on the bar chart there is clearly unallocated space/partition


  • 3
    You have to move "Other partition" to the end of the drive first. – DavidPostill Jun 14 '20 at 15:21
  • 1
    No idea, I've never had to do it. – DavidPostill Jun 14 '20 at 15:23
  • 1
    Is it in GPT mode? – Tony Stewart Sunnyskyguy EE75 Jun 14 '20 at 16:19
  • 1
    @sogu GPT stands for GUID partition table and it is used in UEFI systems and also different from BIOS master boot record MBR. Each UEFI partition has a GUID in the partition table and most modern EFI-based systems use it. You can check at the startup if you are using UEFI or BIOS. – programmer365 Jun 14 '20 at 16:44
  • 1
    If you are using gpt ssd and have it in mbr mode, then try converting it to gpt – programmer365 Jun 14 '20 at 16:48

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