disable EFI Boot Sources

[ctnvca]

This is the error message: Windows cannot be installed to this disk. the selected disk has an MBR partition table. On EFI system, Windows can only be installed to GPT disks.

I need to disable the EFI Boot Sources. HP directions did not help. I can't find the option.

[DavidPK · Accepted solution]

Hi,

If the existing HDD has a mbr partition style ( and assuming you don't have a specific need for mbr ), you can convert this to a guid partition table (gpt) as follows.

Open a Command Prompt- Option 1

Enter the following, hitting return after each entry.

diskpart

list disk

Assuming there is only 1 hard drive installed then enter

select disk 0

clean

convert gpt

when done type exit and hit enter.

Run the Windows 10 installation again.

Regards,

DP-K

[ctnvca]

Thank you. I will try this and let you know the outcome,

[DavidPK]

Ok

[ctnvca]

Thank you.  Now, I have another problem.  I booted from a usb drive made on the same laptop that was suppose to be Windows 10 Pro but it installed as Home edition. I tested the usb on another laptop and it installed as Pro. I reinstalled again on my laptop and it still installed as Home. Any thoughts?       🙂

[DavidPK]

Hi,

You're welcome

Regarding the other issue, I think what's happening is that the installation is reading the product key from the uefi firmware - you can get around this as follows.

Use notepad to make a file called PID.txt and put the following in the file:

[PID]

Value=XXXXX-XXXXX-XXXXX-XXXXX-XXXXX

Place your windows 10 Pro key in where the X's are and save the file to the /sources directory in the root of your USB key. 

The key in the PID file will be read during installation, rather than the OEM key embedded in the firmware of your notebook.

Regards,

DP-K

[ctnvca]

Thank you.  i have the usb open. where do i find the key? Also, when i reinstalled windows it took me 4 tries because i was caught in some sort of 'loop'. I hope you have a fix for that. 🙂

[ctnvca]

Hi. I believe i found the source directory and I pasted it in.

[ctnvca]

Hi. I got it done. Apparantly it installs as Home and then you have to get the update via Microsoft Store. Anyway thank you again. you've been a big help. I'll fix the loop problem later. I'm tired  🙂

[DavidPK]

You're welcome

All the best,

DP-K