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Solved Converting GPT to MBR on Surface 3 Pro


churin

New Member
Member
Posts
185
#1
How can I convert GPT to MBR on Surface3 Pro? The machine comes with one 512GB SSD. There are three partitions or 1)"Windows RE Tools", 2) EFI system and 3)System. I am thinking of re-partitoning the drive using a third party utility to create a MBR system and restoring the backup onto the MBR partition. I want to restore only the system and not the "Windows RE Toos".
I am wondering if the backup taken from the GPT can be restored to a newly created MBR partition.
 

My Computer

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  • OS
    W10 Pro/W8.1 Pro/ W7 Ult
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    AMD FX 6300 x6
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    Gigabyte GA-970A-UD3
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genet

New Member
Guru
Posts
879
#2
How can I convert GPT to MBR on Surface3 Pro?
That's a bad idea, because Secure Boot only works in UEFI boot mode.

Secure Boot protect users from rootkits and other low-level malware attacks by blocking unauthorized (non-signed) executables and drivers from being loaded during the boot process.

I am wondering if the backup taken from the GPT can be restored to a newly created MBR partition.
Windows no longer starts.

Here is info about UEFI Boot Mode (installing using the GPT partition style) and Legacy BIOS Boot Mode (installing using the MBR partition style): link
 

My Computer

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  • OS
    Windows 10
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    Lenovo G580
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    Intel Core i5-3230M
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    8 GB
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    Intel HD Graphics 4000
    Browser
    Microsoft Edge
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    Windows Defender, standard user account
    Other Info
    UEFI firmware (BIOS) embedded Windows 8 product key.

Cliff S

Missing my GIF avatars:(
Pro User
Bamberg Germany

Posts
2,397
#3
The RE tools is your recovery environment. you NEED it. Read here.
 

My Computer

System One

  • OS
    Windows 8.1 Update Pro in Hyper-V/Windows 10 Pro 64 bit
    Computer type
    PC/Desktop
    System Manufacturer/Model
    Cliff's Black & Blue Wonder
    CPU
    Intel Core i9-9900K
    Motherboard
    ASUS ROG Maximus X Hero
    Memory
    32 GB Quad Kit, G.Skill Trident Z RGB Series schwarz, DDR4-3866, 18-19-19-39-2T
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    ZOTAC GAMING GeForce RTX 2080 Ti AMP! Extreme Edition
    Sound Card
    (1) HD Webcam C270 (2) NVIDIA High Definition Audio (3) Realtek High Definition Audio
    Monitor(s) Displays
    BenQ BL2711U(4K) and a hp 27vx(1080p)
    Screen Resolution
    1920 x 1080 x 32 bits (4294967296 colors) @ 60 Hz
    Hard Drives
    C: Samsung 960 EVO NVMe M.2 SSD
    E: & O: Libraries & OneDrive-> Samsung 850 EVO 1TB
    D: Hyper-V VM's -> Samsung PM951 Client M.2 512Gb SSD
    G: System Images -> HDD Seagate Barracuda 2TB
    PSU
    Corsair HX1000i High Performance ATX Power Supply 80+ Platinum
    Case
    hanteks Enthoo Pro TG
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    Thermaltake Floe Riing RGB TT Premium-Edition 360mm and 3 Corsair blue LED fans
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    Trust GTX THURA
    Mouse
    Trust GTX 148
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    25+/5+ (+usually faster)
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    Edge; Chrome; IE11
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    Windows Defender of course & Malwarebytes Anti-Exploit as a
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churin

New Member
Member
Posts
185
#4
genet:
Your reply indicates that if the GPT is converted to MBR I have to clean install the W8.1 but the Windows RE and the security features of UFEI are lost.
Cliff S:
I reviewed the linked reference. I could create a bootable USB flash drive to launch Windows RE. I wonder if this is compatible with MBR.

I am now convinced that converting GPT to MBR is not a good idea. What I want to do now with the drive is to resize the system partition to create a data partition. I assume that for GPT there is no limit of numbers of partitions which is not the case with MBR.
 

My Computer

System One

  • OS
    W10 Pro/W8.1 Pro/ W7 Ult
    Computer type
    PC/Desktop
    CPU
    AMD FX 6300 x6
    Motherboard
    Gigabyte GA-970A-UD3
    Memory
    8GBx2 DDR3 1866 G.Skill F3-1866C9D-16GXM
    Graphics Card(s)
    Radeon R7 360
    Sound Card
    Asus Xonar DS
    Monitor(s) Displays
    Dell P2715Q
    Screen Resolution
    3840 x 2160
    Hard Drives
    Samsung 840Pro SSD 256GB, Samsung 850 Pro 1TBx2 RAID1
    PSU
    Corsair CX430M 500W
    Case
    Corsair 200R
    Cooling
    Zallman CNPS5X
    Internet Speed
    180Mbps/12Mbps
    Browser
    Firefox & IE
    Other Info
    BD Writer LG WH14NS40, DVD RW Pioneer DVR-218L

Cliff S

Missing my GIF avatars:(
Pro User
Bamberg Germany

Posts
2,397
#5
With MBR you can't use UEFI. But! If you have a Windows 8 install media for reinstalls AND a system imager(which you would probably use rather than a reinstall) like Macrium Reflect, you should be good to go, just like it was done with Windows 7. Just after you install 8 and have all your programs installed and everything set up like you want create your first image as a base(or last chance) and then make an image at least once a month and/or before major system changes/updates.

You'll also lose safe boot(checks for rootkits and unsigned software) and fast boot(that you're using an SSD no real loss there;)) without UEFI.

Converting and moving partitions can cause more problems and take more time then its worth. Just sync your settings and account on OneDrive back up your libraries, then go to BIOS and turn UEFI off and reinstall using custom and delete all the old partitions, either let windows do the partitioning or you can change them your self.
 

My Computer

System One

  • OS
    Windows 8.1 Update Pro in Hyper-V/Windows 10 Pro 64 bit
    Computer type
    PC/Desktop
    System Manufacturer/Model
    Cliff's Black & Blue Wonder
    CPU
    Intel Core i9-9900K
    Motherboard
    ASUS ROG Maximus X Hero
    Memory
    32 GB Quad Kit, G.Skill Trident Z RGB Series schwarz, DDR4-3866, 18-19-19-39-2T
    Graphics Card(s)
    ZOTAC GAMING GeForce RTX 2080 Ti AMP! Extreme Edition
    Sound Card
    (1) HD Webcam C270 (2) NVIDIA High Definition Audio (3) Realtek High Definition Audio
    Monitor(s) Displays
    BenQ BL2711U(4K) and a hp 27vx(1080p)
    Screen Resolution
    1920 x 1080 x 32 bits (4294967296 colors) @ 60 Hz
    Hard Drives
    C: Samsung 960 EVO NVMe M.2 SSD
    E: & O: Libraries & OneDrive-> Samsung 850 EVO 1TB
    D: Hyper-V VM's -> Samsung PM951 Client M.2 512Gb SSD
    G: System Images -> HDD Seagate Barracuda 2TB
    PSU
    Corsair HX1000i High Performance ATX Power Supply 80+ Platinum
    Case
    hanteks Enthoo Pro TG
    Cooling
    Thermaltake Floe Riing RGB TT Premium-Edition 360mm and 3 Corsair blue LED fans
    Keyboard
    Trust GTX THURA
    Mouse
    Trust GTX 148
    Internet Speed
    25+/5+ (+usually faster)
    Browser
    Edge; Chrome; IE11
    Antivirus
    Windows Defender of course & Malwarebytes Anti-Exploit as a
    Other Info
    Router: FRITZ!Box 7490
    Sound system: Philips Soundbar HTL2160 w/subwoofer

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