How to remove Win10 compleeeetely from Win8.1 dual boot

TDas

New Member
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This what my disk partitions are:
DiskMan.pngWhat are those partitions numbered 2, 3, 4?

I have not changed the partitions from beginning.
In the beginning, while installing win8.1, i partitioned the complete hdd(GPT) like: C, D, E, F, X.
C for Default Windows and D for any other OS for dual boot.

Now, at starting, There was no dual boot; I installed Win8.1 on C, and D was empty. When Win10 prev came, I installed w10 on D with dual boot.
After that I installed different builds of w10 on D few times, but w8.1 was not reinstalled on C, it was as it is after 1st installation.

In Jun2015, I reinstalled w8.1 on C. And I also reinstalled w10 after its release on 29Jul. I'm writing all these because I don't know in which partition the boot manager is. I know in disk management it's showing C, but.....

I don't know why but now-a-days system starting process from pressing "on" key to w8.1 user login screen has became bit slow. After pressing "on" it takes 1min 20secs to reach OS selection screen.

So, I want to remove w10 and it's boot manager (if any) completely; and make the w8.1 just like if it's installed in empty hdd without dualboot.
 
Last edited:

My Computer

System One

  • OS
    Windows 8.1 Pro Update x64, Windows 10 Pro Preview, Windows 7 HP x64
    Computer type
    Laptop
    System Manufacturer/Model
    Dell Studio 1558; Dell Inspiron 7537
    CPU
    Intel(R) Core(TM) i7 4500U
    Motherboard
    Intel 8 series
    Memory
    4GB x2 DDR3-SDRAM (1333 MHz)
    Graphics Card(s)
    Nvidia GF GT750M
    Screen Resolution
    1920x1080
    Mouse
    Razer Orochi 2013
    Antivirus
    Symantec
3 healthy partitions:
1 of windows 8.1
1 of windows 10
1 of the manufacturer

I don't know about the unallocated partition.
 

My Computer

System One

  • OS
    Windows 10 Pro
    Computer type
    PC/Desktop
    System Manufacturer/Model
    Custom build
    CPU
    i5-6500 @3.20GHz
    Motherboard
    Gigabyte B150-HD3P-CF
    Memory
    16GB DDR4 2133 Crucial Ballistix Sport LT
    Graphics Card(s)
    MSI GeForce GTX 1060 GAMING X 6G
    Sound Card
    Built-in
    Monitor(s) Displays
    Liyama ProLite XB2483HSU-B2
    Screen Resolution
    1920 x 1080
    Hard Drives
    Crucial MX200 500GB & Toshiba DT01ACA300 3TB
    PSU
    Corsair RM550x
    Case
    Fractal Design Define S
    Cooling
    Cooler Master TX3 i
    Keyboard
    Func KB-460 (MX Red)
    Mouse
    Corsair Gaming M65 RGB
    Browser
    Google Chrome
    Antivirus
    Bitdefender Total Security 2017 + MBAM Pro + MBAE Pro
    Other Info
    Creative Sound Blaster Tactic3D Rage V2 headset
Thank you.
 

My Computer

System One

  • OS
    Windows 8.1 Pro Update x64, Windows 10 Pro Preview, Windows 7 HP x64
    Computer type
    Laptop
    System Manufacturer/Model
    Dell Studio 1558; Dell Inspiron 7537
    CPU
    Intel(R) Core(TM) i7 4500U
    Motherboard
    Intel 8 series
    Memory
    4GB x2 DDR3-SDRAM (1333 MHz)
    Graphics Card(s)
    Nvidia GF GT750M
    Screen Resolution
    1920x1080
    Mouse
    Razer Orochi 2013
    Antivirus
    Symantec
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