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I had the same UEFI partions after installing Ubuntu, and the Diskpart suggestion didn't work!

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I have a system with a 128 GB SSD, and a WD15EARS drive. I was hoping to install Windows 8.1 PRO on a 90 Gig partition and the 64 bit version of Ubuntu 14.04 on the 30 Gig partition, and put all of the data and apps on the Western Digital Drive. This is
a brand new system using a Gigabyte B85M-D3H motherboard, 8 Gig Kingston HyperX 1600 Mhz RAM, and an i3-4330 3.5 GHz processor. My BIOS is set to UEFI and Legacy setting by default. I had previously had Windows 8.1 PRO and Ubuntu 14.04 working in a dual boot
configuration but found out I was running the 32 bit version.
I got rid of Ubuntu 32 bit by deleting the partition it was installed on and cleaning up with the Disk Manager from Windows. I created NTFS volumes on the affected partitions and downloaded the 64 bit version of the Ubuntu 14.04 .iso! The first time I tried
to burn a disk, it wasn't bootable, so I downloaded Imgburn and created a bootable CD. I ran the TRY 1st, but when I chose install the program did not recognized that Windows 8.1 Pro was previously installed. It wanted to install to the 90 Gig partition on
my SSD drive (which is where Windows 8.1 PRO) was installed. I manually redirected the install to the Western Digital Drive and the install proceeded until completion.
It was obvious that since Ubuntu did not recognize the previous install of Windows, the Computer rebooted into Ubuntu. This is almost identical to another situation listed.
The solution given was to open an administrative command line and issue the following:
DISKPART
RESCAN
LIST DISK
SELECT DISK #
LIST PARTITION
SELECT PARTITION x
DELETE PARTITION OVERRIDE  ; and I received the following
Virtual disk service error; Delete is not allowed on the Current Boot, System, Pagefile, Crashdump, or Hybernation Volume.
is there any tool that wil wipe partitions no matter what?
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The best answer: Hi,
The reason why you encountered this error is that the partition you wanted to delete is "system" partition, marked as "Active", it contains files to boot into system, so you can't delete it with the command.
And here're some useful links about dual boot Windows 8/8.1 and Ubuntu.
http://askubuntu.com/questions/221835/installing-ubuntu-on-a-pre-installed-windows-8-64-bit-system-uefi-supported
http://itsfoss.com/install-ubuntu-1404-dual-boot-mode-windows-8-81-uefi/
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Yolanda Zhu
TechNet Community Support