Windows 10: Windows not booting after converting secondary storage to GPT

Discus and support Windows not booting after converting secondary storage to GPT in Windows 10 Performance & Maintenance to solve the problem; I have windows installed on my ssd which is still MBR, since MBR cannot support more than 2TB I converted my secondary storage HDD to GPT using disk... Discussion in 'Windows 10 Performance & Maintenance' started by Yiqi Hu, Nov 30, 2022.

  1. YIQI HU
    Yiqi Hu Win User

    Windows not booting after converting secondary storage to GPT


    I have windows installed on my ssd which is still MBR, since MBR cannot support more than 2TB I converted my secondary storage HDD to GPT using disk manager. On the next boot my pc was showing “Reboot and Select proper Boot device ecc…”I tried to disconnect the the secondary storage and reboot the system, but I had the same error

    :)
     
    Yiqi Hu, Nov 30, 2022
    #1
  2. ANUP KARKAL
    Anup Karkal Win User

    Cannot convert GPT to MBR.

    Hi Michael,



    I suggest you to follow the below steps and check if it helps.

    This method you have to backup all your data and delete all partitions and volumes. Then use the
    DISKPART command.

    • Open command prompt and type in DISKPART and press Enter
    • Then type in list disk (Note down the number of disk you want to convert to GPT)
    • Then type in select disk number of disk
    • Finally type in convert gpt.
    Hope the information helps. Do reply if you need further assistance.
     
    Anup Karkal, Nov 30, 2022
    #2
  3. SMITTYCHAT.
    Smittychat. Win User
    Smittychat., Nov 30, 2022
    #3
  4. TOPGUNDCP
    topgundcp Win User

    Windows not booting after converting secondary storage to GPT

    Converting MBR to GPT for EFI boot?


    @Mystere
    Sorry but did you read the steps I posted ?. What do you mean by: It may boot up, but won't be EFI ? How else does it boot up with a GPT disk ? Here's the screen shot

    Windows not booting after converting secondary storage to GPT [​IMG]
     
    topgundcp, Nov 30, 2022
    #4
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Windows not booting after converting secondary storage to GPT

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