Solved New Build Can't accept Windows 11


Both are correct and incorrect at the same time.

When using MBR (or with Legacy? never tried GPT + Legacy), Windows will create 4 partitions: MSR, unlabeled, OS and Recovery.
When using GPT (with UEFI), Windows will create 3 partitions: EFI, OS, and Recovery.

The sizes of the MSR + unlabeled < EFI.
Your first post here and you would be mistaken. For one thing, it is impossible to have an MSR on an MBR disk. When installing on GPT in UEFI mode, Windows creates 4 partitions, not three. EFI System Partition (ESP) [FAT32], Microsoft System Reserved Partition (MSR) [no filesystem], Windows [NTFS], Recovery [NTFS].

When installing in Legacy mode on an MBR disk, Windows used to create 3 partitions: System Reserved Partition [NTFS, maked active], Windows [NTFS], Recovery [NTFS].
 
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System One System Two

  • OS
    Windows 11
    Computer type
    PC/Desktop
    Manufacturer/Model
    Homebuilt
    CPU
    AMD Ryzen 7 3800XT
    Motherboard
    ASUS ROG Crosshair VII Hero (WiFi)
    Memory
    32GB
    Graphics Card(s)
    EVGA GeForce GTX 1080 Ti
  • Operating System
    Windows 11 Education
    Computer type
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    Manufacturer/Model
    Dell Inspiron 7773
    CPU
    Intel i7-8550U
    Memory
    32GB
    Graphics card(s)
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    Sound Card
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    Monitor(s) Displays
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    Screen Resolution
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    SK Hynix 512GB SATA SSD
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