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  1.    27 Aug 2015 #1
    Join Date : Aug 2015
    Posts : 2
    Windows 7

    How to install Windows 10 with minimalizing used disc space?


    Hi All,
    My question is, how can I install Windows 10, that it uses the less disc space, it can?
    My problem is, that I have laptop with 64 GB SSD, and after upgrading (from windows 8.1) to Windows 10, the used space is more than 35 GB, so now I have a very little free disc space now.
    Thanks!
      My ComputerSystem Spec
  2.    27 Aug 2015 #2
    Join Date : Oct 2014
    Trnava
    Posts : 2,980
    10.4 Home 1709 x64

    It would be best to use clean install for that. My 10 + some software take 15GB (no pagefile/hibernation).
    Attached Thumbnails Attached Thumbnails capture_08272015_111108.jpg  
      My ComputerSystem Spec
  3.    27 Aug 2015 #3
    Join Date : Jan 2014
    Posts : 1,395
    Windows 10 Pro (32-bit) 16299.15

    If you go to an elevated command prompt, and type this command, what does it say:
    Code:
    compact /compactos:query
    Ideally it should say 'The system is in the compact state'

    Edit: another thing you can do is use Disk Cleanup to delete the old version of Windows, but I'd perhaps take a backup before doing that, in case you want to get it back somehow.
      My ComputerSystem Spec
  4.    27 Aug 2015 #4
    Join Date : Aug 2015
    Posts : 68
    Windows 7 & 10

    The articles I've read suggest Windows 10 installs in a compressed mode (the replacement for WIMBoot) on disks that are 32GB or less, and this seems to be the case as it installed compressed on a 32GB tablet I have but not compressed on a 64GB one. If the command DavidY mentions does not indicate you are in a compact state you'll need to fool the installer into thinking your disk is smaller than it is. Presumably you could force this on a larger disk by partitioning - delete all existing partitions, then create two equal sized ones that fill the disk (~30GB each), then delete the first one and tell Windows 10 to install in the unpartitioned space. After installation you should be able to delete the second ~30GB partition and expand your main partition to fill the disk. I stress that I have not tested this however!

    The compact command also appears to let you change the state without reinstalling, maybe?
      My ComputerSystem Spec
  5.    27 Aug 2015 #5
    Join Date : Aug 2015
    Penn's Woods
    Posts : 1,288
    Windows 10 Home

    Quote Originally Posted by ga214 View Post
    Hi All,
    My question is, how can I install Windows 10, that it uses the less disc space, it can?
    My problem is, that I have laptop with 64 GB SSD, and after upgrading (from windows 8.1) to Windows 10, the used space is more than 35 GB, so now I have a very little free disc space now.
    Thanks!
    What exactly is taking up the space? Try Start/Settings/System/Storage and click on your disk drive on the right and find out what is taking up the most space. You can continue to click on the displayed categories to drill down to what is taking up the most room. Could be old windows installation, system restore points, etc. Let us know what you find out so we can zero in on more specific guidance.
      My ComputerSystem Spec
  6.    27 Aug 2015 #6
    Join Date : Mar 2015
    New Mexico
    Posts : 1,336
    Windows 10 Pro,

    Remove the Windows Old file and you should be good.
      My ComputerSystem Spec
  7.    27 Aug 2015 #7
    Join Date : Jan 2014
    Posts : 1,395
    Windows 10 Pro (32-bit) 16299.15

    Quote Originally Posted by xtcrefugee View Post
    The compact command also appears to let you change the state without reinstalling, maybe?
    Yes I think you can change the state with that command.
      My ComputerSystem Spec
  8.    27 Aug 2015 #8
    Join Date : Dec 2013
    Sydney, Nova Scotia, Canada
    Posts : 10,612
    Windows 10 IoT

    Run Disk Cleanup, and do the Clean up system files option. Be aware, once you delete the Windows .old, you can't use the Rollback option.
      My ComputerSystem Spec
  9.    27 Aug 2015 #9
    Join Date : Jul 2015
    Posts : 9,552
    Windows 10 Pro

    Quote Originally Posted by DavidY View Post
    Yes I think you can change the state with that command.
    Here's an interesting read. I had never heard of the compact command before!
    About the Compact OS deployment in Windows 10 | Deltas Lair

    Looks like the command to actually change the state is:
    compact /CompactOs:always

    To turn it off:
    compact /CompactOS:never
      My ComputerSystem Spec
  10.    28 Aug 2015 #10
    Join Date : Aug 2015
    Posts : 2
    Windows 7
    Thread Starter

    Thanks for the ideas!
    Deleting windows.old directory saves me lot of spaces.
    Now the used space is "only" 26,6 GB. It has some temporary files (1,5GB), Office(?) (600MB), Lenovo Photo Master (674 MB), so I could reduce it a little bit.

    I have only one question left. Settings-System-Storage says that I have 26,6 GB used space and 57,8GB total space. Where is the missing 6,2 GB (to 64GB disc which I have)?
      My ComputerSystem Spec

 
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