Clean install

JAy Cutler

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People, a little help!

I'm going to do a clean install for the first time with MediaCreationToolW11, so I'd just be interested, do I have to delete the whole C partition during installation?

Attached aClean1.jpgre images of the discs.
 

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NavyLCDR

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Yes. And you should delete every partition on the disk until it is nothing but unallocated space.

 

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Wisewiz

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@NavyLCDR

This new thread has reminded me of a question I have.

Clean installing 11 tomorrow on a new blank SSD. Nothing but unallocated space will be there. Assuming the installation will create the partitions it needs, and leave the rest of the disk as unallocated space, and I can then create a new partition volume for my new Drive D, can you tell me how much of the new SSD Win11 will occupy by default with its several partitions?
 

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NavyLCDR

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@NavyLCDR

This new thread has reminded me of a question I have.

Clean installing 11 tomorrow on a new blank SSD. Nothing but unallocated space will be there. Assuming the installation will create the partitions it needs, and leave the rest of the disk as unallocated space, and I can then create a new partition volume for my new Drive D, can you tell me how much of the new SSD Win11 will occupy by default with its several partitions?
Windows 10 and Windows 11 setup will occupy the entire physical disk by default. If you want a D drive partition afterward, you need to shrink C drive to make room for it.
 

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Wisewiz

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Many thanks. I'll get 'er done that way.
 

My Computers

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  • Operating System
    11 Pro 21H2 (22000.194)
    Computer type
    PC/Desktop
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    Lenovo ThinkCentre M910S SFF
    CPU
    i7-7700 @ 3.60MHz
    Motherboard
    Lenovo
    Memory
    16GB DDR4 @ 2400MHz
    Graphics Card(s)
    Intel 630 onboard
    Sound Card
    Realtek HD Audio
    Monitor(s) Displays
    LG E2442
    Screen Resolution
    1920x1080
    Hard Drives
    2 x Samsung 870 EVO SSD
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    Lenovo SFF
    Keyboard
    Microsoft Wired 600
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    LogiTech M510 wireless
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    Malwarebytes Premium & Defender (working together beautifully!)
  • Operating System
    Windows 10 Pro 21H2
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    Lenovo Think Centre M83 SFF
    CPU
    To be updated when I have time
    Motherboard
    To be updated when I have time
    Memory
    16GB DDR3
    Graphics card(s)
    To be updated when I have time
    Sound Card
    Realtek High Definition Audio onboard
    Monitor(s) Displays
    LG FULL HD (1920x1080@59Hz)
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    Hard Drives
    2 x Samsung 870 EVO SSD
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    Malwarebytes Premium and MS Defender
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RFS

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When you clean install, the process will first allocate the disks - C drive and about 3 small system parititions. It will ask you what size you want for the C drive, with the default being the remaining space. You can specify what size you want, but on my SSDs I've set the C drive as 100 Gb and only use that for Windows. All data is elsewhere so I can easily back up and restore the C drive with Macrium Reflect.
 

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NavyLCDR

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When you clean install, the process will first allocate the disks - C drive and about 3 small system parititions. It will ask you what size you want for the C drive, with the default being the remaining space. You can specify what size you want, but on my SSDs I've set the C drive as 100 Gb and only use that for Windows. All data is elsewhere so I can easily back up and restore the C drive with Macrium Reflect.
In the hundreds of clean installs I have done to unallocated drives, Windows setup has never asked me what size I want to make C: drive. In this tutorial can you show where it asks for what size you want C: drive to be?

 

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    AMD Ryzen 7 3800XT
    Motherboard
    ASUS ROG Crosshair VII Hero (WiFi)
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    32GB
    Graphics Card(s)
    EVGA GeForce GTX 1080 Ti
  • Operating System
    Windows 11 Education
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    Dell Inspiron 7773
    CPU
    Intel i7-8550U
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    32GB
    Graphics card(s)
    Nvidia Geforce MX150
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    1920 x 1080
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    Toshiba 512GB NVMe SSD
    SK Hynix 512GB SATA SSD
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Quandary

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I clean installed from an ISO on 10/4 without any prep to the drive that contained the .194 build. The disk had the usual 4 partitions with a C: and D: drive. During setup I just selected the C: drive, and none of the other were impacted.

Be aware that the install, with an MS account, may create a different account name to what you may have had before. It does not let you create the account with a specific name. This really only matters if you restore any configuration files that point to the old account name.
 

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AddRAM

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And unplug all other drives (just the power cable) or disable all other drives in the Bios.
Your installer should only see 1 drive to install windows on.
 

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RFS

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In the hundreds of clean installs I have done to unallocated drives, Windows setup has never asked me what size I want to make C: drive. In this tutorial can you show where it asks for what size you want C: drive to be?

When you get to step 11, where you have a completely unallocated volume, instead of clicking "next", click "new". You will then be prompted for a size which will default to the max size.

In the example the next screen shows a pre-alloacted volume with data which must be a different volume.
 
Last edited:

My Computer

System One

  • Operating System
    Windows 11
    Computer type
    PC/Desktop
    Manufacturer/Model
    Self-build
    CPU
    Intel I3-8100
    Motherboard
    Gigabyte Z370 D3
    Memory
    8 GB
    Graphics Card(s)
    Intel integrated
    Monitor(s) Displays
    Philips 27 inch
    Screen Resolution
    1920x1080
    Hard Drives
    Samsung 960 SSD 256 Gb
    Seagate 2 Tb HDD
    PSU
    ATX 450W
    Keyboard
    Logitech
    Mouse
    Logitech Wireless
    Internet Speed
    150 Mb FTTP
    Browser
    Edge
    Antivirus
    Windows Defender
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