Windows 10: Why to size differences in Windows 10 files? Also a question removing.

  1.    20 Aug 2015 #1

    Why to size differences in Windows 10 files? Also a question removing.

    Two not to, sorry about that.

    I have two ASUS Computers.

    G73SW from Win7pro to Win10 Win10 program 1size 18.7gb 92,424 files. Old Win 27.2gb 117.322 files.

    G73JH from Win 8.1 to Win10 program size 16.9gb 104.641 files. Old Win 16.466gb 138.595 files.

    Why the size differences in both program sizes and files? Any reason not to delete the old Windows files?
    Last edited by digitalcurisity; 20 Aug 2015 at 08:28.
      My ComputerSystem Spec

  2. Ztruker's Avatar
    Posts : 6,424
    Windows 10 Pro X64 17134.191
       21 Aug 2015 #2

    Windows.old is needed if you want to roll back (Go back) to the previous OS in the 30 days after the upgrade. If you don't plan to do that or made an image backup before the upgrade then delete it.

    I use CCleaner to do it but Disk Cleanup can also get rid of it.
      My ComputersSystem Spec


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