From the day Microsoft launched Windows 10, millions of users upgraded their OS to the latest edition of Windows. But, a few of the Windows users who have upgraded to Win 10 encountered an error message that states “Windows 10 couldn’t be installed. Windows can’t be installed because this PC has an unsupported disk layout for UEFI firmware” while downloading and installing Windows 10 Updates.
You cannot ignore this error since it prevents you from installing the Windows updates, as Windows updates are released to fix issues and increase system performance.
Where in some of the users come across another form of the same error message, “This PC can’t run Windows 10. Windows can’t be installed because this PC has an unsupported disk layout for UEFI firmware.” Hence they cannot install Windows 10 on the computer.
Generally, this error message pops up on computers that are having both UEFI and BIOS firmware (hybrids). This is because the Windows 10 operating system or Windows 10 update cannot be installed/run on an MBR disk of a UEFI computer.
Even if you can successfully install Windows 10 on an MBR disk of the UEFI system, later you will be stuck at installing Windows 10 updates.
Thus, GPT and UEFI are directly associated with each just like your Windows 10 OS and Windows 10 updates. So, you can upgrade to Windows 10/install its updates only on a GPT hard disk of the UEFI firmware computer.
Caution: It is recommended to back up your important or entire data saved on the hard drive before you get started with the repair process. You can do this by simply creating an image file (System Image) of your hard disk and restoring it later when you have successfully fixed the error. If not, directly move required data or all of your files from the hard drive (HDD) to an external storage device like an external hard drive, SSD, or USB flash drive.
To create an MSR partition, type the below commands and press Enter after each:
In case, you see nothing (no * mark) under the GPT of your disk then your hard drive should be converted into GPT format by clean installing Windows 10. If so, then directly jump to Method 2.
Be careful when using the Command Prompt to modify your hard disk partitions and structure. Since, there is no way for you to recover data from an accidentally deleted partition, from a hard drive with a missing partition table, after partition table corruption/damage, or to restore a lost partition from unallocated space of the hard drive other than using a data recovery program.
So, properly read the output, errors, or warnings you see on the Command Prompt editor window. Type each command carefully and wait till it gets completed. Then, type the next one.
Now, your disk will be shown as Drive D Unallocated Space (your disk number will be present in place of D) along with its total size.
Follow the on-screen instructions to clean and install Windows 10.
Windows will convert the unallocated space on your hard disk into partitions, and simultaneously the drive will be converted into GPT format. When you are successfully completed with the Windows 10 installation process, set up your account and finish configurations.
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