Is it true that the next Windows 10 upgrade requires GPT-format disk?

I read this somewhere, but I can't remember the source, or else I would have included the URL.

It doesn't seem right. My wife's 2012 system runs Win 10 just fine with an SSD, thank you, but her system does NOT have UEFI BIOS.

Mystere said:

I would be highly surprised that any PC manufactured in 2012 doesn't have a UEFI bios. Just because it has UEFI doesn't mean it can't boot old versions of software.

My wife's system is a homebuilt using an ASUS motherboard. It is quite likely that the design is older than 2012. I'm actualy travelling right now, so I can't check the BIOS.

As long as I can I will stay away from UEFI, legacy BIOS is just fine for me. Much less troubles.

Mystere said:

What troubles? It's just a bios.

And GPT, and UEFI partition, incompatibility with some backup/restore utilities, just few unnecessary complications. I can and do everything in legacy mode I could do as UEFI as my board has both.

UEFI is mostly about taking advantage of advanced features like Secure Boot. If you don't have UEFI you can't use Secure Boot. Here are some other advantages of UEFI cribbed from an old Sun (!) explanation:

• Support for hard drive partitions larger than 2 Tbytes.
• Support for more than four partitions on a drive.
• Fast booting.
• Efficient power and system management.
• Robust reliability and fault management.

HTH, and thanks for posting. Your older non-UEFI system should be fine running Windows 10. I have two non-UEFI systems running it right now.
--Ed--

EdTittel said:

UEFI is mostly about taking advantage of advanced features like Secure Boot. If you don't have UEFI you can't use Secure Boot. Here are some other advantages of UEFI cribbed from an old Sun (!) explanation:

• Support for hard drive partitions larger than 2 Tbytes.
• Support for more than four partitions on a drive.
• Fast booting.
• Efficient power and system management.
• Robust reliability and fault management.

HTH, and thanks for posting. Your older non-UEFI system should be fine running Windows 10. I have two non-UEFI systems running it right now.
--Ed--

Ed,

Yes, this helps, since I didn't know about the last two bullets.

How did you know I used to work for Sun Microsystems? In the "glory days" before the Tech Crash in 2000.