Solved Remove Previous Windows installation(s)?

jvickers

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Now that I'm pretty much wed to and ensconced in Windows 11, do you think it's safe to delete the previous windows installations? Those file are eating up 26GB of my 512GB SSD, which only has around 100GB free at the moment?
 
Windows Build/Version
Windows 11

My Computers

System One System Two

  • OS
    Windows 11 Pro
    Computer type
    PC/Desktop
    Manufacturer/Model
    Home built
    CPU
    Ryzen 7 3700X
    Motherboard
    MSI MPG X570 GAMING EDGE WIFI
    Memory
    Crucial Ballistix Sport LT 3200 MHz DDR4 DRAM Desktop Gaming Memory 32MB
    Graphics Card(s)
    ZOTAC Gaming GeForce GTX 1660 Super 6GB GDDR6 192-bit Gaming Graphics Card/ ZOTAC GeForce GTX 1050 Ti Mini, 4GB GDDR5 DisplayPort 128-bit Gaming Graphic Card
    Sound Card
    Proprietary
    Monitor(s) Displays
    ViewSonic XG2530 25"/Benq XL2411P 24"/ Samsung SyncMaster BX2331 23"
    Screen Resolution
    1920x1080 240Hz/144Hz/60Hz (based on monitor setup above)
    Hard Drives
    ADATA XPG SX8200 Pro 1TB
    ADATA XPG SX8200 Pro 512GB
    Samsung SSD 860 EVO 1TB 2.5 Inch SATA III Internal SSD
    PSU
    Thermaltake Smart 700W 80+ White Certified PSU
    Case
    Rosewill ATX Mid Tower Gaming Computer Case, Gaming Case with Blue LED for Desktop
    Cooling
    Stock Ryzen 7 3700X Fan (Soon to be iCUE H60i RGB PRO XT Liquid CPU Cooler)
    Keyboard
    Corsair K70
    Mouse
    Logitech MX Master 3
    Internet Speed
    120MB/s Download/ 10MB/s Upload
    Browser
    Edge (Chromium)
    Antivirus
    Norton 360
  • Operating System
    Windows 10
    Computer type
    PC/Desktop
    Manufacturer/Model
    Home Built
    CPU
    AMD FX Black Edition
    Motherboard
    Asus M5A97 LE R2.0
    Memory
    16MB DDR
    Graphics card(s)
    I forget, but it's old.
    Sound Card
    Propietary
    Monitor(s) Displays
    ACER LED 24"
    Screen Resolution
    1920X1080
    Hard Drives
    1TB Samsung SSD 3.5"
    Case
    Corsair
    Cooling
    Stock
    Mouse
    Logitech
    Keyboard
    Logitech
    Internet Speed
    120MB/10MB
    Browser
    Chrome
    Antivirus
    Norton 360
    Other Info
    Currently taken down because of a lack of space :-(
    Maybe I'll make room somewhere and connect to the Dev channel if possible.

RFS

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Now that I'm pretty much wed to and ensconced in Windows 11, do you think it's safe to delete the previous windows installations? Those file are eating up 26GB of my 512GB SSD, which only has around 100GB free at the moment?

See this thread from earlier today. I believe the official way is disk cleanup which is in Windows Tools.

 

My Computers

System One System Two

  • OS
    Windows 11 Home
    Computer type
    PC/Desktop
    Manufacturer/Model
    Self-build
    CPU
    Intel I3-8100
    Motherboard
    Gigabyte Z370 D3
    Memory
    16 GB
    Graphics Card(s)
    Nvidia GT 710
    Sound Card
    Motherboard default
    Monitor(s) Displays
    Philips 27 inch
    Screen Resolution
    1920x1080
    Hard Drives
    Samsung 960 NVMe 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
  • Operating System
    Windows 11 Home
    Computer type
    PC/Desktop
    Manufacturer/Model
    Self-build
    CPU
    Intel i3-10100
    Motherboard
    MSI H410M-PRO
    Memory
    16 Gb
    Graphics card(s)
    Nvidia GeForce GT 1030
    Sound Card
    Motherboard default
    Monitor(s) Displays
    Philips 27-inch
    Screen Resolution
    1920x1080
    Hard Drives
    Samsung EVO 970 250 Gb NVMe SSD
    Samsung QVO 870 2 Tb SATA SSD
    PSU
    ATX 450W
    Mouse
    Logitech Wireless
    Keyboard
    Microsoft
    Internet Speed
    150 MB FTTP
    Browser
    Edge
    Antivirus
    Windows Defender
    Other Info
    Microsoft Office 2016 Home and Business

CornishRattler

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Now that I'm pretty much wed to and ensconced in Windows 11, do you think it's safe to delete the previous windows installations? Those file are eating up 26GB of my 512GB SSD, which only has around 100GB free at the moment?
I always ditch them straight away as part of a post update clean-up. Macrium back up always done just prior to an update so there's no point to keep it
 

My Computer

System One

  • OS
    Windows 11 Pro
    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
    Samsung 970 Evo Plus 1TB
    Samsung 970 Evo Plus 500GB

Fabler2

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Now that I'm pretty much wed to and ensconced in Windows 11, do you think it's safe to delete the previous windows installations? Those file are eating up 26GB of my 512GB SSD, which only has around 100GB free at the moment?
As long as you have an image to go back to then yes.
 

My Computers

System One System Two

  • OS
    Win 10 Home
    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

jvickers

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I have an image, so there's no worries there.
 

My Computers

System One System Two

  • OS
    Windows 11 Pro
    Computer type
    PC/Desktop
    Manufacturer/Model
    Home built
    CPU
    Ryzen 7 3700X
    Motherboard
    MSI MPG X570 GAMING EDGE WIFI
    Memory
    Crucial Ballistix Sport LT 3200 MHz DDR4 DRAM Desktop Gaming Memory 32MB
    Graphics Card(s)
    ZOTAC Gaming GeForce GTX 1660 Super 6GB GDDR6 192-bit Gaming Graphics Card/ ZOTAC GeForce GTX 1050 Ti Mini, 4GB GDDR5 DisplayPort 128-bit Gaming Graphic Card
    Sound Card
    Proprietary
    Monitor(s) Displays
    ViewSonic XG2530 25"/Benq XL2411P 24"/ Samsung SyncMaster BX2331 23"
    Screen Resolution
    1920x1080 240Hz/144Hz/60Hz (based on monitor setup above)
    Hard Drives
    ADATA XPG SX8200 Pro 1TB
    ADATA XPG SX8200 Pro 512GB
    Samsung SSD 860 EVO 1TB 2.5 Inch SATA III Internal SSD
    PSU
    Thermaltake Smart 700W 80+ White Certified PSU
    Case
    Rosewill ATX Mid Tower Gaming Computer Case, Gaming Case with Blue LED for Desktop
    Cooling
    Stock Ryzen 7 3700X Fan (Soon to be iCUE H60i RGB PRO XT Liquid CPU Cooler)
    Keyboard
    Corsair K70
    Mouse
    Logitech MX Master 3
    Internet Speed
    120MB/s Download/ 10MB/s Upload
    Browser
    Edge (Chromium)
    Antivirus
    Norton 360
  • Operating System
    Windows 10
    Computer type
    PC/Desktop
    Manufacturer/Model
    Home Built
    CPU
    AMD FX Black Edition
    Motherboard
    Asus M5A97 LE R2.0
    Memory
    16MB DDR
    Graphics card(s)
    I forget, but it's old.
    Sound Card
    Propietary
    Monitor(s) Displays
    ACER LED 24"
    Screen Resolution
    1920X1080
    Hard Drives
    1TB Samsung SSD 3.5"
    Case
    Corsair
    Cooling
    Stock
    Mouse
    Logitech
    Keyboard
    Logitech
    Internet Speed
    120MB/10MB
    Browser
    Chrome
    Antivirus
    Norton 360
    Other Info
    Currently taken down because of a lack of space :-(
    Maybe I'll make room somewhere and connect to the Dev channel if possible.

Bree

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Windows 11 Home
do you think it's safe to delete the previous windows installations?
First thing I do after any upgrade is use Disk Clean up to clean up system files and delete previous Windows installations. There are a few other things besides Windows.old, clean up removes them all.

Of course, the first thing I do before any upgrade is make a Macrium system image, so 'going back' is easy anyway ;)
 

My Computers

System One System Two

  • OS
    Windows 11 Home
    Computer type
    Laptop
    Manufacturer/Model
    Acer Aspire 3 A315-23
    CPU
    AMD Athlon Silver 3050U
    Memory
    8GB
    Graphics Card(s)
    Radeon Graphics
    Monitor(s) Displays
    laptop screen
    Screen Resolution
    1366x768 native resolution, up to 2560x1440 with Radeon Virtual Super Resolution
    Hard Drives
    1TB HDD
    Browser
    Edge, Firefox
    Antivirus
    Defender
    Other Info
    fully 'Windows 11 ready' laptop. Windows 10 C: partition migrated from my old unsupported 'main machine' then upgraded to 11. A test migration ran Insider builds for 2 months. When 11 was released on 5th October it was re-imaged back to 10 and was offered the upgrade in Windows Update on 20th October.


    My SYSTEM THREE is a Dell Latitude 5410, i7-10610U, 32GB RAM, 512GB ssd, Windows 11 Pro.
  • Operating System
    Windows 11 Pro
    Computer type
    Laptop
    Manufacturer/Model
    Dell Lattitude E4310
    CPU
    i5 M 520
    Motherboard
    0T6M8G
    Memory
    4GB
    Screen Resolution
    1366x768
    Hard Drives
    500GB HDD
    Browser
    Firefox, Edge
    Antivirus
    Defender
    Other Info
    unsupported machine: Legacy bios, MBR, TPM 1.2, upgraded from W10 to W11 using W10/W11 hybrid install media workaround.


    My SYSTEM THREE is a Dell Latitude 5410, i7-10610U, 32GB RAM, 512GB ssd, Windows 11 Pro.
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