Windows 10: Convert an mbr drive with windows 10 to a gpt drive.

So I have an ssd with windows 10 and i want to convert it to gpt, is it possible to do it without losing my data? And if not, how do i backup my data and convert the drive.

:)

 

Convert Windows 10 MBR to GPT (UEFI)?

In reviewing my Windows 10 Pro (64-bit) system I noted that the Secure Boot Status is showing as "unsupported". Investigating further, it appears either the GPT partition for booting using UEFI (is Secure Boot) has become corrupt or my installation was
never installed for Secure Boot. My Windows 10 install is an auto-upgrade from a Windows 8.1 install.

Is there a way to convert the MBR to GPT without doing a fresh install? I do have a USB recovery drive built at a point I believe I had indications Windows was booting from a GPT (UEFI) partition. In fact, the USB recovery drive shows as being a UEFI drive.

Any suggestions will be appreciated!

Thanks!

 

Converting a hard drive from GPT to MBR.

Managing disk partitions is a risky task. Make sure you have all your data backed up.

What do you want to do:
- Convert a data drive from GPT to MBR?
- Convert a boot able drive from GPT to MBR?
- Do a clean install using a win 10 installation drive and convert the drive from GPT to MBR?

If it is a data drive you can convert from GPT to MBR.
Diskpart commands will clean up the drive. To convert without loosing data you must use a program like Mini Toll partition wizard .

But if the drive is a boot able drive, you can't just convert from UEFI - GPT to Legacy - MBR. You have to make sure your BIOS can use Legacy boot drive.
You have to boot from an external drive (like WinPE), launch Mini Toll partition wizard, convert from GPT to MBR and rebuild bcdboot.

diskpart
list volume (take note of windows partition letter)
select volume x (replace x with the windows partition letter)
active
exit
bcdboot C:\Windows /s C: /f BIOS
exit

 

Convert GPT to MBR

j0 all.

I bought an external hard drive to my sister, filled it and sent it to her (she lives like 1200km from me), she gets it, can't use it. I start to dig, and finds out it uses GPT instead of MBR and that Windows XP (which she uses) can't read that. Annoyance. She sends it back (because none of the people she knows down there has 500GB spare backup space *Stick Out Tongue ) so I can set things straight.

However, if you want to convert a disk to MBR the disk can't have any partitions. But the disk looks like (see below). What's that about? I know EFI is some Mac something (or intel something or something sumthin'). The Convert to MBR option is greyed out.

Can I use another tool for that? What do I do?

Thanks for looking!

/Frick





Disk2 is the external drive. It's a Seagate something.