Missing 18 GB on Boot Drive


  1. kritz
    Posts : 4
    Windows 7 Professional 64 bit, SP1
       New #1

    Missing 18 GB on Boot Drive


    I've seen a number of threads on this topic but they haven't helped.

    I have a 119 GB SSD as my boot drive, which Properties reports as having 79.3 GB used. However, only 61 GB of files show up when selected via Ctrl-A.

    • I have made all hidden/system files visible
    • I have turned off Hibernation and there is no hibernation file on the drive
    • I have moved the pagefile to another drive and while there is a 262 MB "swapfile.sys" on the boot drive, this doesn't account for the missing GBs
    • System Restore has never been turned on and there are no restore points
    • Chkdsk reported no bad sectors
    • I have looked at the disk with WinDirStat and it indicates that I have only 61 GB of files and there is no single 18 GB file (the amount missing)
    • I have about 900 MB of Windows 7 patches (again, not enough to account for the missing GBs)

    I am stumped. Suggestions? TIA.
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  3. Britton30
    Posts : 24,479
    Windows 7 Ultimate X64 SP1
       New #2

    Welcome to Seven Forums.

    How much free space is listed in Properties?

    Disk Management - Post a Screen Capture Image
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  4. kritz
    Posts : 4
    Windows 7 Professional 64 bit, SP1
    Thread Starter
       New #3

    Approx. 39 GB.
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  6. whs
    Posts : 26,210
    Vista, Windows7, Mint Mate, Zorin, Windows 8
       New #4

    Could be restore points. Run this command and look for the 'Allocated' number.

    vssadmin list shadowstorage

    To get a complete picture of the files, run this program - http://windirstat.info/
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  7. kritz
    Posts : 4
    Windows 7 Professional 64 bit, SP1
    Thread Starter
       New #5

    I don't think there are any restore points, but I'll give this a look after I've gotten back to my computer. Thanks!
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  8. whs
    Posts : 26,210
    Vista, Windows7, Mint Mate, Zorin, Windows 8
       New #6

    Restore points are created automatically on many occasions. Unless you disabled system restore for C, there will be some.
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  10. Britton30
    Posts : 24,479
    Windows 7 Ultimate X64 SP1
       New #7

    If you have 79.3GB used and 39GB free, that's 118.3GB, which sounds OK for the 118GB drive. I suspect the 61GB shown with Select all isn't counting the hidden and maybe program data files.
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  11. kritz
    Posts : 4
    Windows 7 Professional 64 bit, SP1
    Thread Starter
       New #8

    All hidden and system files are set to display.
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  12. Ztruker
    Posts : 6,285
    Windows 10 Pro X64
       New #9

    Run Treesize Free: TreeSize Free - Quickly Scan Directory Sizes and Find Space Hogs

    It will tell you exactly where you disk space is being used.
      My Computer
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  13. madcratebuilder
    Posts : 1,045
    Win8/8.1,Win7-U64, Vista U64, uncounted Linux distor's
       New #10

    SSD drives can have a small partition for what Samsung calls Over Provisioning.

    The Over Provisioning menu provides options for resizing partitions on the disk. The SSD will perform better and last longer if it has free space available to use as swap space, and this utility will help you set aside such space by resizing the partitions on your drive. Swap space is used to perform routine SSD maintenance (TRIM and Garbage Collection) in the background during idle time, allowing the SSD Controller to prepare free blocks for the OS to use in the future. Because the SSD performs best when writing to free blocks, the result is a better user experience through reduced wait time
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