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Is GPT UEFI not compatible with W8?

churin

Member
Member
I am new to GPT UEFI. I recently assembled a new UEFI-capable machine and transferred the MBR-based system to this machine from an old machine. The transferred system is a multi-boot system for W10, W8.1, and W7. After confirming W10 and W8.1 work as in the old machine(W7 did not because the new CPU does not support W7), the drive type is converted from the MBR to the GPT. It is found that W10 boots but W8.1 did not even its partition is set active.
 

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My Computer

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  • OS
    Windows 8.1, Windows 7 Ultimate, Windows 10, Linux Mint and more
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    CPU
    AMD 3800X, Intel 6900K
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    X99 E-WS USB 3.1, CROSSHAIR HERO VIII
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    PC builder. Own a dozen PCs / built hundreds. All of us have a lot to learn. Some of us stand to learn more than others and those who think they know the most generally know the least. I'm here to learn and pass on what little I know.

churin

Member
Member
Thanks for your reply.
I am primarily interested in using Windows installation(W10/W8 dual boot) so that I do not have to re-install application software.
I have tried a third-party utility software to convert the MBR drive to the GPT drive, but it did not work as reported.
Since my post, I have found that I can install W8.1 on a GPT drive. So now the answer to the title of this thread is Yes.
I attempted to convert the MBR drive on which only W8.1 is installed to the GPT, but after conversion, the W8.1 failed to boot.

Anyone knows of utility software to convert the drive type between MBR and GTP?
BTW: EaseUS Partition Master is the one I tried.
 

My Computer

System One

  • OS
    W10 Pro/W8.1 Pro/ W7 Ult
    Computer type
    PC/Desktop
    System Manufacturer/Model
    Self Built
    CPU
    AMD Ryzen 5 5600X Six-Core
    Motherboard
    Gigabyte X570 AORUS Ultra 1.1/1.2 BIOS v.F32
    Memory
    16GBx2 DDR4 3600 G.SKILL Ripjaws V Series
    Graphics Card(s)
    Radeon RX 6500 XT
    Sound Card
    -
    Monitor(s) Displays
    Dell UP2720Q
    Screen Resolution
    3840 x 2160
    Hard Drives
    1TB SATA SSD(OS) SSung 870 EVO, 1TB M.2 NVMe SSD(OS) SSung 970 EVO Plus, 4TB SATA SSD(Data)
    PSU
    Corsair RM650 650W
    Case
    Fractal Design Focus G Black ATX Mid Tower Computer Case, FD-CA-FOCUS-BK-W
    Cooling
    Cooler Master MasterLiquid Lite 120 AIO CPU Liquid Cooler
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    DURGOD TAURUS K320 Mechanical Keyboard
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    Microsoft Model 1049
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    ICY DOCK 4 x 2.5 SSD to 5.25 Drive Bay - ExpressCage MR324SP-B
    ICY DOCK M.2 NVMe Mobile Rack for External 3.5" Bay - MB834M2K-B
I've done this for clients using different software. I am not sure about free versions but the one I like to use is MiniTool Partition Wizard Pro Ultimate. If you have a spare drive I recommend making a drive image before you begin in the event that the proceedure fails. There is a possibility that you may have to bite the bullet and simply reinstall Windows 8.1 to a freshly formatted GPT drive. There is another tool you might wish to try that will likely allow you the ability to boot to your existing drive, at least to recover your data. It is called EASY BCD and you can get it for free. I hope this helps.
 

My Computer

System One

  • OS
    Windows 8.1, Windows 7 Ultimate, Windows 10, Linux Mint and more
    Computer type
    PC/Desktop
    System Manufacturer/Model
    ASUS
    CPU
    AMD 3800X, Intel 6900K
    Motherboard
    X99 E-WS USB 3.1, CROSSHAIR HERO VIII
    Memory
    128 GB CORSAIR DOMINATOR, 32 GB TEAM GROUP T FORCE
    Graphics Card(s)
    NVIDIA 1070, SAPPHIRE RX 590 NITRO+
    Sound Card
    ONBOARD
    Monitor(s) Displays
    SAMSUNG 32"
    Screen Resolution
    4K
    Hard Drives
    :::GRINS::: SERIOUSLY?
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    CORSAIR 1000 W PLATINUM
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    PC builder. Own a dozen PCs / built hundreds. All of us have a lot to learn. Some of us stand to learn more than others and those who think they know the most generally know the least. I'm here to learn and pass on what little I know.

Bree

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VIP Member
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My Computer

System One

  • OS
    8.1
    System Manufacturer/Model
    Hyper-V

droniexx

New Member
Thanks for your reply.
I am primarily interested in using Windows installation(W10/W8 dual boot) so that I do not have to re-install application software.
I have tried a third-party utility software to convert the MBR drive to the GPT drive, but it did not work as reported.
Since my post, I have found that I can install W8.1 on a GPT drive. So now the answer to the title of this thread is Yes.
I attempted to convert the MBR drive on which only W8.1 is installed to the GPT, but after conversion, the W8.1 failed to boot.

Anyone knows of utility software to convert the drive type between MBR and GTP?
BTW: EaseUS Partition Master is the one I tried.
 

My Computer

System One

  • OS
    win 8.1
    Computer type
    Laptop
    System Manufacturer/Model
    worstation 7710
    CPU
    i7 6th gen
    Memory
    64 GB
    Graphics Card(s)
    deicated Intel HD 530
    Sound Card
    Realtek
    Screen Resolution
    3840x2160
    Hard Drives
    the SSD total 2.480TB
    Case
    worstation /Laptop
    Cooling
    Twin Fans
    Mouse
    Wireless
    Browser
    firefox 64 bit
    Antivirus
    windows defender

droniexx

New Member
Hi Churin
I am with you on dual boot Although I now have a laptop with three drives. How hever getting back to Dual Boot
First I found I needed to UEFI capability on my laptop. Then what was obvious I patitioned my SSD 1TB drive into three partions Two partitions of 40 GB each One for Win 10 Pro one for win 8.1 pro I made two USB with win versions and had the formated to GPT (fat 32 standard) the Both versions
gave no problems. That is the formula for perfect operating system.
 

My Computer

System One

  • OS
    win 8.1
    Computer type
    Laptop
    System Manufacturer/Model
    worstation 7710
    CPU
    i7 6th gen
    Memory
    64 GB
    Graphics Card(s)
    deicated Intel HD 530
    Sound Card
    Realtek
    Screen Resolution
    3840x2160
    Hard Drives
    the SSD total 2.480TB
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    worstation /Laptop
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    Twin Fans
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    Wireless
    Browser
    firefox 64 bit
    Antivirus
    windows defender

Bree

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I patitioned my SSD 1TB drive into three partions Two partitions of 40 GB each One for Win 10 Pro one for win 8.1 pro..... That is the formula for perfect operating system.
Not quite. Microsoft now require OEMs to provide a minimum of 64GB storage before they will licence a device to be supplied with Windows 10 pre-installed. This is why you no longer see Windows PCs with 32GB eMMC drives on the market. While 32GB is sufficient to install and run Windows 10, it is not sufficient space for a feature update, there won't be enough space for the windows.old folder. Your 40GB would likely have problems down the line too. I'd recommend making your partitions a little larger at 64GB.

And should you consider Windows 11, the installer will refuse to install if there less than 64GB storage available.
 

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  • OS
    8.1
    System Manufacturer/Model
    Hyper-V

churin

Member
Member
I jumped to the link in the post by Bree. The link for my present thread is as follows and I appreciate your participation:
 

My Computer

System One

  • OS
    W10 Pro/W8.1 Pro/ W7 Ult
    Computer type
    PC/Desktop
    System Manufacturer/Model
    Self Built
    CPU
    AMD Ryzen 5 5600X Six-Core
    Motherboard
    Gigabyte X570 AORUS Ultra 1.1/1.2 BIOS v.F32
    Memory
    16GBx2 DDR4 3600 G.SKILL Ripjaws V Series
    Graphics Card(s)
    Radeon RX 6500 XT
    Sound Card
    -
    Monitor(s) Displays
    Dell UP2720Q
    Screen Resolution
    3840 x 2160
    Hard Drives
    1TB SATA SSD(OS) SSung 870 EVO, 1TB M.2 NVMe SSD(OS) SSung 970 EVO Plus, 4TB SATA SSD(Data)
    PSU
    Corsair RM650 650W
    Case
    Fractal Design Focus G Black ATX Mid Tower Computer Case, FD-CA-FOCUS-BK-W
    Cooling
    Cooler Master MasterLiquid Lite 120 AIO CPU Liquid Cooler
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    DURGOD TAURUS K320 Mechanical Keyboard
    Mouse
    Microsoft Model 1049
    Internet Speed
    600Mbps/25Mbps
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    Microsoft Defender
    Other Info
    ICY DOCK 4 x 2.5 SSD to 5.25 Drive Bay - ExpressCage MR324SP-B
    ICY DOCK M.2 NVMe Mobile Rack for External 3.5" Bay - MB834M2K-B

droniexx

New Member
Not quite. Microsoft now require OEMs to provide a minimum of 64GB storage before they will licence a device to be supplied with Windows 10 pre-installed. This is why you no longer see Windows PCs with 32GB eMMC drives on the market. While 32GB is sufficient to install and run Windows 10, it is not sufficient space for a feature update, there won't be enough space for the windows.old folder. Your 40GB would likely have problems down the line too. I'd recommend making your partitions a little larger at 64GB.

And should you consider Windows 11, the installer will refuse to install if there less than 64GB storage available.
 

My Computer

System One

  • OS
    win 8.1
    Computer type
    Laptop
    System Manufacturer/Model
    worstation 7710
    CPU
    i7 6th gen
    Memory
    64 GB
    Graphics Card(s)
    deicated Intel HD 530
    Sound Card
    Realtek
    Screen Resolution
    3840x2160
    Hard Drives
    the SSD total 2.480TB
    Case
    worstation /Laptop
    Cooling
    Twin Fans
    Mouse
    Wireless
    Browser
    firefox 64 bit
    Antivirus
    windows defender

droniexx

New Member
Hi Bree
Thanks for your iformation regarding partition side. My son who is in it for american company told me the same.
He told me because I have a 1TB drive it would make sense to partition a min of 80 GB which I have. Again thanks for for your input.
 

My Computer

System One

  • OS
    win 8.1
    Computer type
    Laptop
    System Manufacturer/Model
    worstation 7710
    CPU
    i7 6th gen
    Memory
    64 GB
    Graphics Card(s)
    deicated Intel HD 530
    Sound Card
    Realtek
    Screen Resolution
    3840x2160
    Hard Drives
    the SSD total 2.480TB
    Case
    worstation /Laptop
    Cooling
    Twin Fans
    Mouse
    Wireless
    Browser
    firefox 64 bit
    Antivirus
    windows defender
Not to sound too critical, but a 80GB thumb drive these days is considered small, let alone an 80GB hard drive. It has been my experience that in most cases a hard drive under 100GB is a recipe for disaster. If you are putting an o/s on a drive that size, especially a Windows o/s, this can be especially true. Windows is well known for their elaborate updates and bloatware and disk cleanup can only go so far before you run into a whole new set of issues with it. In addition to this, if you wish to save personal files and other files on the drive you could easily run out of room fast so there is a little "future proofing" to consider here. I tend to draw the line on 120GB because of the popularity of SSDs but even then this is not my preference.

I am a big fan of multi-booting and some of the builds I have done have as many as 4 different operating systems on them. They work flawlessly. Howbeit, in the case of multiboot builds I highly recommend getting away from multibooting on a single drive. Multiboot on a single drive is considerbly more risky than using separate hard drives and designating one o/s per drive. Besides, if anything should happen to the drive then you also risk losing all operating systems, which, imo, rather defeats the purpose of having a multi-boot in the first place.

If you are working with partitions this size I highly recommend putting your operating systems on separate drives. SSDs are relatively inexpensive these days and even a 120GB SSD will suffice compared to what you're currently using. Windows 8 on one SSD and Windows 10 on another will afford you better security, drive longevity, and stability when done correctly. It is relatively simple to image your operating systems to separate drives with the tools you have. Plus, you can make short cuts to your desktop on both operating systems to your 1TB drive, which you can use for storage, archives, etc. giving you access to the data via either operating system. I hope this helps.*
Hi Bree
Thanks for your iformation regarding partition side. My son who is in it for american company told me the same.
He told me because I have a 1TB drive it would make sense to partition a min of 80 GB which I have. Again thanks for for your input.
* Caveat - My advice does assume that you have room for a couple of extra drives and the hardware to connect them. Laptops can be very limiting at times but most laptops these days usually afford the user at least enough room for one more drive, be it NVMe, SSD, or mechanical drive.
 
Last edited:

My Computer

System One

  • OS
    Windows 8.1, Windows 7 Ultimate, Windows 10, Linux Mint and more
    Computer type
    PC/Desktop
    System Manufacturer/Model
    ASUS
    CPU
    AMD 3800X, Intel 6900K
    Motherboard
    X99 E-WS USB 3.1, CROSSHAIR HERO VIII
    Memory
    128 GB CORSAIR DOMINATOR, 32 GB TEAM GROUP T FORCE
    Graphics Card(s)
    NVIDIA 1070, SAPPHIRE RX 590 NITRO+
    Sound Card
    ONBOARD
    Monitor(s) Displays
    SAMSUNG 32"
    Screen Resolution
    4K
    Hard Drives
    :::GRINS::: SERIOUSLY?
    PSU
    CORSAIR 1000 W PLATINUM
    Case
    THERMAL TAKE / AZZA
    Cooling
    NOCTUA / CM
    Keyboard
    LOGITECH PRODIGY
    Mouse
    LOGITECH
    Internet Speed
    1 GBs
    Browser
    FIREFOX
    Antivirus
    KASPERSKY
    Other Info
    PC builder. Own a dozen PCs / built hundreds. All of us have a lot to learn. Some of us stand to learn more than others and those who think they know the most generally know the least. I'm here to learn and pass on what little I know.
Suddenly things just got complicated. :roflmao:
 

My Computer

System One

  • OS
    Windows 8.1, Windows 7 Ultimate, Windows 10, Linux Mint and more
    Computer type
    PC/Desktop
    System Manufacturer/Model
    ASUS
    CPU
    AMD 3800X, Intel 6900K
    Motherboard
    X99 E-WS USB 3.1, CROSSHAIR HERO VIII
    Memory
    128 GB CORSAIR DOMINATOR, 32 GB TEAM GROUP T FORCE
    Graphics Card(s)
    NVIDIA 1070, SAPPHIRE RX 590 NITRO+
    Sound Card
    ONBOARD
    Monitor(s) Displays
    SAMSUNG 32"
    Screen Resolution
    4K
    Hard Drives
    :::GRINS::: SERIOUSLY?
    PSU
    CORSAIR 1000 W PLATINUM
    Case
    THERMAL TAKE / AZZA
    Cooling
    NOCTUA / CM
    Keyboard
    LOGITECH PRODIGY
    Mouse
    LOGITECH
    Internet Speed
    1 GBs
    Browser
    FIREFOX
    Antivirus
    KASPERSKY
    Other Info
    PC builder. Own a dozen PCs / built hundreds. All of us have a lot to learn. Some of us stand to learn more than others and those who think they know the most generally know the least. I'm here to learn and pass on what little I know.
I find it Ironic that the thread in the Win 10 group concludes on the first page of that thread with the same advice I offered here on April 21rst. If the laptop handles three drives why all the fuss about keeping the dual boot on the same drive? Separate drives are much more practical and imo easier to configure.
 

My Computer

System One

  • OS
    Windows 8.1, Windows 7 Ultimate, Windows 10, Linux Mint and more
    Computer type
    PC/Desktop
    System Manufacturer/Model
    ASUS
    CPU
    AMD 3800X, Intel 6900K
    Motherboard
    X99 E-WS USB 3.1, CROSSHAIR HERO VIII
    Memory
    128 GB CORSAIR DOMINATOR, 32 GB TEAM GROUP T FORCE
    Graphics Card(s)
    NVIDIA 1070, SAPPHIRE RX 590 NITRO+
    Sound Card
    ONBOARD
    Monitor(s) Displays
    SAMSUNG 32"
    Screen Resolution
    4K
    Hard Drives
    :::GRINS::: SERIOUSLY?
    PSU
    CORSAIR 1000 W PLATINUM
    Case
    THERMAL TAKE / AZZA
    Cooling
    NOCTUA / CM
    Keyboard
    LOGITECH PRODIGY
    Mouse
    LOGITECH
    Internet Speed
    1 GBs
    Browser
    FIREFOX
    Antivirus
    KASPERSKY
    Other Info
    PC builder. Own a dozen PCs / built hundreds. All of us have a lot to learn. Some of us stand to learn more than others and those who think they know the most generally know the least. I'm here to learn and pass on what little I know.

churin

Member
Member
I have been using a triple boot system on one physical drive for over ten years. I have 5 different versions of the systems. Therefore, a system using multiple physical drives is no option for me.
At the W10 group, there is no response for two days now so I have to continue the troubleshooting on my own.
 

My Computer

System One

  • OS
    W10 Pro/W8.1 Pro/ W7 Ult
    Computer type
    PC/Desktop
    System Manufacturer/Model
    Self Built
    CPU
    AMD Ryzen 5 5600X Six-Core
    Motherboard
    Gigabyte X570 AORUS Ultra 1.1/1.2 BIOS v.F32
    Memory
    16GBx2 DDR4 3600 G.SKILL Ripjaws V Series
    Graphics Card(s)
    Radeon RX 6500 XT
    Sound Card
    -
    Monitor(s) Displays
    Dell UP2720Q
    Screen Resolution
    3840 x 2160
    Hard Drives
    1TB SATA SSD(OS) SSung 870 EVO, 1TB M.2 NVMe SSD(OS) SSung 970 EVO Plus, 4TB SATA SSD(Data)
    PSU
    Corsair RM650 650W
    Case
    Fractal Design Focus G Black ATX Mid Tower Computer Case, FD-CA-FOCUS-BK-W
    Cooling
    Cooler Master MasterLiquid Lite 120 AIO CPU Liquid Cooler
    Keyboard
    DURGOD TAURUS K320 Mechanical Keyboard
    Mouse
    Microsoft Model 1049
    Internet Speed
    600Mbps/25Mbps
    Browser
    Firefox & IE
    Antivirus
    Microsoft Defender
    Other Info
    ICY DOCK 4 x 2.5 SSD to 5.25 Drive Bay - ExpressCage MR324SP-B
    ICY DOCK M.2 NVMe Mobile Rack for External 3.5" Bay - MB834M2K-B
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