Solved Can't Create Dual Boot


The-Hive

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I am trying to create dual boot on my other pc. It was originally on 10 and updated to Win 11 via Windows update
It is fully compliant for 11.
I want a dual boot of both Windows 11
I created a partition of unallocated space
Downloaded an ISO but it tries to install in place of the other OS by the look of it
Any help gratefully recieved
 

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System One System Two

  • OS
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    Computer type
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    Manufacturer/Model
    Alienware Area 51m R2
    CPU
    10th Gen Core i9 10900K
    Memory
    32GB
    Graphics Card(s)
    Geforce RTX 2080 Super
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  • Operating System
    Dual Boot Windows 11 Pro / Windows 11 Pro Dev build
    Computer type
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    Dell Inspiron 3501
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    11th Gen i-7 2.80 gb
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    16Gb
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The-Hive

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UPDATE....
All sorted up to the point of install How can I make Windows install into the unallocated space
 

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System One System Two

  • OS
    Windows 11 Pro
    Computer type
    Laptop
    Manufacturer/Model
    Alienware Area 51m R2
    CPU
    10th Gen Core i9 10900K
    Memory
    32GB
    Graphics Card(s)
    Geforce RTX 2080 Super
    Screen Resolution
    1920x1080
    Hard Drives
    C: Samsung 2TB P981A
    D: Samsung 2TB 970 Evo
    Mouse
    Alienware AW610M
    Browser
    Chrome and Firefox
    Antivirus
    Norton
    Other Info
    Killer E3000 Ethernet Controller
    Killer AX1650i Wi-Fi Network Adaptor
    Alienware Z01G Graphic Amplifier
    Tobii Eye Tracker
  • Operating System
    Dual Boot Windows 11 Pro / Windows 11 Pro Dev build
    Computer type
    Laptop
    Manufacturer/Model
    Dell Inspiron 3501
    CPU
    11th Gen i-7 2.80 gb
    Memory
    16Gb
    Screen Resolution
    1920 x 1080
    Hard Drives
    512Gb SSD
    2GB External drive
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CornishRattler

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Can set up see the unallocated space?
 

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System One

  • OS
    Windows 11 Pro Beta, 11 Dev, W10 VHDX Triple Boot
    Computer type
    Laptop
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    Dell Alienware M15 Ryzen Edition R6
    CPU
    AMD Ryzen™ 9 5900HX
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    32GB
    Graphics Card(s)
    NVIDIA® GeForce RTX™ 3070 8GB GDDR6
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The-Hive

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I don't know, it just automatically installs offering to keep my files and folders etc.
 

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System One System Two

  • OS
    Windows 11 Pro
    Computer type
    Laptop
    Manufacturer/Model
    Alienware Area 51m R2
    CPU
    10th Gen Core i9 10900K
    Memory
    32GB
    Graphics Card(s)
    Geforce RTX 2080 Super
    Screen Resolution
    1920x1080
    Hard Drives
    C: Samsung 2TB P981A
    D: Samsung 2TB 970 Evo
    Mouse
    Alienware AW610M
    Browser
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    Antivirus
    Norton
    Other Info
    Killer E3000 Ethernet Controller
    Killer AX1650i Wi-Fi Network Adaptor
    Alienware Z01G Graphic Amplifier
    Tobii Eye Tracker
  • Operating System
    Dual Boot Windows 11 Pro / Windows 11 Pro Dev build
    Computer type
    Laptop
    Manufacturer/Model
    Dell Inspiron 3501
    CPU
    11th Gen i-7 2.80 gb
    Memory
    16Gb
    Screen Resolution
    1920 x 1080
    Hard Drives
    512Gb SSD
    2GB External drive
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CornishRattler

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Did you mount the iso and select this from the sources folder...

Screenshot 2022-02-28 210301.png
 

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    Windows 11 Pro Beta, 11 Dev, W10 VHDX Triple Boot
    Computer type
    Laptop
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    Dell Alienware M15 Ryzen Edition R6
    CPU
    AMD Ryzen™ 9 5900HX
    Memory
    32GB
    Graphics Card(s)
    NVIDIA® GeForce RTX™ 3070 8GB GDDR6
    Hard Drives
    1 x Samsung 980 Pro 1TB
    1 x Samsung 970 Evo Plus 1TB

TheMystic

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UPDATE....
All sorted up to the point of install How can I make Windows install into the unallocated space
It should ask you where you want to install. Are you not getting that screen?
 

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    Windows 11
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    HP Envy dv7
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    Intel Core i7 3630QM
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CornishRattler

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After you click that set up file it'll ask if you want to go online to search for updates, click no. Then it'll ask about product key, select I don't have one, then select custom install at which point it will show your drives and partitions and the unallocated space

One thing....after you partitioned the drive did you create a simple volume? it won't see it if you didn't
 

My Computer

System One

  • OS
    Windows 11 Pro Beta, 11 Dev, W10 VHDX Triple Boot
    Computer type
    Laptop
    Manufacturer/Model
    Dell Alienware M15 Ryzen Edition R6
    CPU
    AMD Ryzen™ 9 5900HX
    Memory
    32GB
    Graphics Card(s)
    NVIDIA® GeForce RTX™ 3070 8GB GDDR6
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    1 x Samsung 980 Pro 1TB
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The-Hive

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I have tried booting from the same USB or from Setup.exe, It checks for updates and then starts to install it dose not ask for the product key that is why I think it is installing to the C: partition. I wonder if if doesn't like installing 11 twice, maybe I should dual boot 11 and 10

Once I tried it and it could not find any devices to install to. I shall a good look at it tomorrow and report back
 

My Computers

System One System Two

  • OS
    Windows 11 Pro
    Computer type
    Laptop
    Manufacturer/Model
    Alienware Area 51m R2
    CPU
    10th Gen Core i9 10900K
    Memory
    32GB
    Graphics Card(s)
    Geforce RTX 2080 Super
    Screen Resolution
    1920x1080
    Hard Drives
    C: Samsung 2TB P981A
    D: Samsung 2TB 970 Evo
    Mouse
    Alienware AW610M
    Browser
    Chrome and Firefox
    Antivirus
    Norton
    Other Info
    Killer E3000 Ethernet Controller
    Killer AX1650i Wi-Fi Network Adaptor
    Alienware Z01G Graphic Amplifier
    Tobii Eye Tracker
  • Operating System
    Dual Boot Windows 11 Pro / Windows 11 Pro Dev build
    Computer type
    Laptop
    Manufacturer/Model
    Dell Inspiron 3501
    CPU
    11th Gen i-7 2.80 gb
    Memory
    16Gb
    Screen Resolution
    1920 x 1080
    Hard Drives
    512Gb SSD
    2GB External drive
    Browser
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CornishRattler

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I have tried booting from the same USB or from Setup.exe, It checks for updates and then starts to install it dose not ask for the product key that is why I think it is installing to the C: partition. I wonder if if doesn't like installing 11 twice, maybe I should dual boot 11 and 10
I have both 11's. Don't click set up.exe. You need to open the iso and get that set up from the sources folder pictured above. Format the unallocated space as a new volume in disk management before you start
 

My Computer

System One

  • OS
    Windows 11 Pro Beta, 11 Dev, W10 VHDX Triple Boot
    Computer type
    Laptop
    Manufacturer/Model
    Dell Alienware M15 Ryzen Edition R6
    CPU
    AMD Ryzen™ 9 5900HX
    Memory
    32GB
    Graphics Card(s)
    NVIDIA® GeForce RTX™ 3070 8GB GDDR6
    Hard Drives
    1 x Samsung 980 Pro 1TB
    1 x Samsung 970 Evo Plus 1TB

The-Hive

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Thanks I will try that
 

My Computers

System One System Two

  • OS
    Windows 11 Pro
    Computer type
    Laptop
    Manufacturer/Model
    Alienware Area 51m R2
    CPU
    10th Gen Core i9 10900K
    Memory
    32GB
    Graphics Card(s)
    Geforce RTX 2080 Super
    Screen Resolution
    1920x1080
    Hard Drives
    C: Samsung 2TB P981A
    D: Samsung 2TB 970 Evo
    Mouse
    Alienware AW610M
    Browser
    Chrome and Firefox
    Antivirus
    Norton
    Other Info
    Killer E3000 Ethernet Controller
    Killer AX1650i Wi-Fi Network Adaptor
    Alienware Z01G Graphic Amplifier
    Tobii Eye Tracker
  • Operating System
    Dual Boot Windows 11 Pro / Windows 11 Pro Dev build
    Computer type
    Laptop
    Manufacturer/Model
    Dell Inspiron 3501
    CPU
    11th Gen i-7 2.80 gb
    Memory
    16Gb
    Screen Resolution
    1920 x 1080
    Hard Drives
    512Gb SSD
    2GB External drive
    Browser
    Chrome
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    Norton

CornishRattler

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So recap...
Format the unallocated space as a new volume first, I always name it rather than keep it as new volume so I don't muddle the target partition up a bit later

1. Open this (or similar)
Screenshot 2022-02-28 212300.png

2. Then open sources
Screenshot 2022-02-28 212342.png
3.Then choose this (it's quite a way down)
Screenshot 2022-02-28 210301.png
4. Accept UAC
5. Don't check for updates
6. Choose custom install
7. If you've formatted the target partition then it will show up, select it and then OK
Let windows do it's stuff.

This install will become the default boot option, you can change that later in MSConfig if you want
 
Last edited:

My Computer

System One

  • OS
    Windows 11 Pro Beta, 11 Dev, W10 VHDX Triple Boot
    Computer type
    Laptop
    Manufacturer/Model
    Dell Alienware M15 Ryzen Edition R6
    CPU
    AMD Ryzen™ 9 5900HX
    Memory
    32GB
    Graphics Card(s)
    NVIDIA® GeForce RTX™ 3070 8GB GDDR6
    Hard Drives
    1 x Samsung 980 Pro 1TB
    1 x Samsung 970 Evo Plus 1TB

cereberus

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I have both 11's. Don't click set up.exe. You need to open the iso and get that set up from the sources folder pictured above. Format the unallocated space as a new volume in disk management before you start
Yep - this.

When you install via the iso, you can only install to a formatted partition.
 

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  • OS
    Windows 10 Pro + others in VHDs
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    ASUS Vivobook 14
    CPU
    I7
    Motherboard
    Yep, Laptop has one.
    Memory
    16 GB
    Graphics Card(s)
    Integrated Intel Iris XE
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    Realtek built in
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    N/A
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    1920x1080
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    1 TB Optane NVME SSD, 1 TB NVME SSD
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    Yep, got one
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The-Hive

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The guide I followed on the web did not mention formatting it, it said leave it unformatted. ....Off we go to try again
 

My Computers

System One System Two

  • OS
    Windows 11 Pro
    Computer type
    Laptop
    Manufacturer/Model
    Alienware Area 51m R2
    CPU
    10th Gen Core i9 10900K
    Memory
    32GB
    Graphics Card(s)
    Geforce RTX 2080 Super
    Screen Resolution
    1920x1080
    Hard Drives
    C: Samsung 2TB P981A
    D: Samsung 2TB 970 Evo
    Mouse
    Alienware AW610M
    Browser
    Chrome and Firefox
    Antivirus
    Norton
    Other Info
    Killer E3000 Ethernet Controller
    Killer AX1650i Wi-Fi Network Adaptor
    Alienware Z01G Graphic Amplifier
    Tobii Eye Tracker
  • Operating System
    Dual Boot Windows 11 Pro / Windows 11 Pro Dev build
    Computer type
    Laptop
    Manufacturer/Model
    Dell Inspiron 3501
    CPU
    11th Gen i-7 2.80 gb
    Memory
    16Gb
    Screen Resolution
    1920 x 1080
    Hard Drives
    512Gb SSD
    2GB External drive
    Browser
    Chrome
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    Norton

CornishRattler

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The guide I followed on the web did not mention formatting it, it said leave it unformatted. ....Off we go to try again
Some ride isn't it :D

Set up won't see it if it's not formatted
 

My Computer

System One

  • OS
    Windows 11 Pro Beta, 11 Dev, W10 VHDX Triple Boot
    Computer type
    Laptop
    Manufacturer/Model
    Dell Alienware M15 Ryzen Edition R6
    CPU
    AMD Ryzen™ 9 5900HX
    Memory
    32GB
    Graphics Card(s)
    NVIDIA® GeForce RTX™ 3070 8GB GDDR6
    Hard Drives
    1 x Samsung 980 Pro 1TB
    1 x Samsung 970 Evo Plus 1TB

Fabler2

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I'm dual booting on 3 laptops. All I did was to create an unallocated space behind the last recovery partition by shortening the C partition and moving the recovery partition to the left. Installed to the unallocated space.
 

My Computers

System One System Two

  • OS
    Win 11 Pro & Dev.
    Computer type
    Laptop
    Manufacturer/Model
    ASUS VivoBook
    CPU
    AMD Ryzen 7 3700U with Radeon Vega Mobile Gfx
    Motherboard
    ASUSTeK COMPUTER INC. X509DA (FP5)
    Memory
    12GB
    Graphics Card(s)
    RX Vega 10 Graphics
    Monitor(s) Displays
    Generic PnP Monitor (1920x1080@60Hz)
    Screen Resolution
    1920x1080@60Hz
    Hard Drives
    INTEL SSD 660p 512GB NVMe
    Internet Speed
    25 Mbps
    Browser
    Edge
    Antivirus
    Defender
  • Operating System
    Windows 11
    Computer type
    Laptop
    Manufacturer/Model
    ACER
    CPU
    AMD Ryzen 7 5800H / 3.2 GHz
    Motherboard
    CZ Scala_CAS (FP6)
    Memory
    16 GB (2 x 8 GB) DDR4 SDRAM 3200 MHz
    Graphics card(s)
    NVIDIA GeForce RTX 3060 6 GB GDDR6 SDRAM
    Sound Card
    Realtek Audio. NVIDIA High Definition Audio
    Monitor(s) Displays
    15.6" LED backlight 1920 x 1080 (Full HD) 144 Hz
    Screen Resolution
    1920 x 1080 (Full HD)
    Hard Drives
    1.024 TB SSD M.2 2280 - Samsung
    PSU
    180 Watt, 19.5 V
    Mouse
    Logitech
    Internet Speed
    25 Mbps
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CornishRattler

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I'm dual booting on 3 laptops. All I did was to create an unallocated space behind the last recovery partition by shortening the C partition and moving the recovery partition to the left. Installed to the unallocated space.
Yeah, exactly what I do but if I leave it as unallocated set up will not see the space to install to, I've always had to format the created partition
 

My Computer

System One

  • OS
    Windows 11 Pro Beta, 11 Dev, W10 VHDX Triple Boot
    Computer type
    Laptop
    Manufacturer/Model
    Dell Alienware M15 Ryzen Edition R6
    CPU
    AMD Ryzen™ 9 5900HX
    Memory
    32GB
    Graphics Card(s)
    NVIDIA® GeForce RTX™ 3070 8GB GDDR6
    Hard Drives
    1 x Samsung 980 Pro 1TB
    1 x Samsung 970 Evo Plus 1TB

Fabler2

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Yeah, exactly what I do but if I leave it as unallocated set up will not see the space to install to, I've always had to format the created partition
That's odd as it's recommended to install on an unallocated space.
 

My Computers

System One System Two

  • OS
    Win 11 Pro & Dev.
    Computer type
    Laptop
    Manufacturer/Model
    ASUS VivoBook
    CPU
    AMD Ryzen 7 3700U with Radeon Vega Mobile Gfx
    Motherboard
    ASUSTeK COMPUTER INC. X509DA (FP5)
    Memory
    12GB
    Graphics Card(s)
    RX Vega 10 Graphics
    Monitor(s) Displays
    Generic PnP Monitor (1920x1080@60Hz)
    Screen Resolution
    1920x1080@60Hz
    Hard Drives
    INTEL SSD 660p 512GB NVMe
    Internet Speed
    25 Mbps
    Browser
    Edge
    Antivirus
    Defender
  • Operating System
    Windows 11
    Computer type
    Laptop
    Manufacturer/Model
    ACER
    CPU
    AMD Ryzen 7 5800H / 3.2 GHz
    Motherboard
    CZ Scala_CAS (FP6)
    Memory
    16 GB (2 x 8 GB) DDR4 SDRAM 3200 MHz
    Graphics card(s)
    NVIDIA GeForce RTX 3060 6 GB GDDR6 SDRAM
    Sound Card
    Realtek Audio. NVIDIA High Definition Audio
    Monitor(s) Displays
    15.6" LED backlight 1920 x 1080 (Full HD) 144 Hz
    Screen Resolution
    1920 x 1080 (Full HD)
    Hard Drives
    1.024 TB SSD M.2 2280 - Samsung
    PSU
    180 Watt, 19.5 V
    Mouse
    Logitech
    Internet Speed
    25 Mbps
    Browser
    Edge
    Antivirus
    Defender

CornishRattler

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  • OS
    Windows 11 Pro Beta, 11 Dev, W10 VHDX Triple Boot
    Computer type
    Laptop
    Manufacturer/Model
    Dell Alienware M15 Ryzen Edition R6
    CPU
    AMD Ryzen™ 9 5900HX
    Memory
    32GB
    Graphics Card(s)
    NVIDIA® GeForce RTX™ 3070 8GB GDDR6
    Hard Drives
    1 x Samsung 980 Pro 1TB
    1 x Samsung 970 Evo Plus 1TB

The-Hive

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Still not there yet........After following the advice of @CornishRattler Everything started to install exactly as it should. The computer said it needed to restart to continue and it restarted but then the sad face and we ran into a problem the code was boot device not found or something similar. New simple volume, drive letter F: and called Windows 11 Dev
Screenshot 2022-03-01 130811.png
 

My Computers

System One System Two

  • OS
    Windows 11 Pro
    Computer type
    Laptop
    Manufacturer/Model
    Alienware Area 51m R2
    CPU
    10th Gen Core i9 10900K
    Memory
    32GB
    Graphics Card(s)
    Geforce RTX 2080 Super
    Screen Resolution
    1920x1080
    Hard Drives
    C: Samsung 2TB P981A
    D: Samsung 2TB 970 Evo
    Mouse
    Alienware AW610M
    Browser
    Chrome and Firefox
    Antivirus
    Norton
    Other Info
    Killer E3000 Ethernet Controller
    Killer AX1650i Wi-Fi Network Adaptor
    Alienware Z01G Graphic Amplifier
    Tobii Eye Tracker
  • Operating System
    Dual Boot Windows 11 Pro / Windows 11 Pro Dev build
    Computer type
    Laptop
    Manufacturer/Model
    Dell Inspiron 3501
    CPU
    11th Gen i-7 2.80 gb
    Memory
    16Gb
    Screen Resolution
    1920 x 1080
    Hard Drives
    512Gb SSD
    2GB External drive
    Browser
    Chrome
    Antivirus
    Norton

CornishRattler

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Have you got a Macrium recovery set up?
At what point did it fail?
 
Last edited:

My Computer

System One

  • OS
    Windows 11 Pro Beta, 11 Dev, W10 VHDX Triple Boot
    Computer type
    Laptop
    Manufacturer/Model
    Dell Alienware M15 Ryzen Edition R6
    CPU
    AMD Ryzen™ 9 5900HX
    Memory
    32GB
    Graphics Card(s)
    NVIDIA® GeForce RTX™ 3070 8GB GDDR6
    Hard Drives
    1 x Samsung 980 Pro 1TB
    1 x Samsung 970 Evo Plus 1TB
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