[SOLVED] Unconvertable hard drive

[ronny_6]

Is there a way of converting a hard drive from mbr to gpt without having a functional os, having tried diskpart and it says unconvertable, cant install wondows 10.. also I see no option if disabling UEFI in bios

 

[Colif]

is there anything on drive you want to keep?

otherwise I would run a diskpart clean on hdd and then run the win 10 installer, do a custom install and choose the unallocated space and click next.

boot from installer
on screen after languages, choose repair this pc, not install.
choose troubleshoot
choose advanced
choose command prompt
type diskpart and press enter
type list disk and press enter
this shows all drives available, DVD/USB and hdd, make note of hdd number
type Select disk X - where X is the number of the hdd you want to wipe, change X to that number and press enter
once the drive you want to wipe is chosen, type Clean

boot from installer
follow this guide: http://www.tenforums.com/tutorials/1950-windows-10-clean-install.html
when you reach the screen asking for licence, click "I don't have a key" and win 10 will continue to install and reactivate once finished

if there is data, can you move it?
boot from installer
on screen after languages, choose repair this pc, not install.
choose troubleshoot
choose advanced
choose command prompt
type notepad and press enter
in notepad, select file>open
Use file explorer to copy any files you need to save to USB or hdd