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Assuming I wanted to upgrade my System from Windows 7 to Windows 10.

I have the installer extracted from another drive disk and my files are in single directory including the Windows Installer.

e.g. of file structure:

  • MY_BACKUP (Here is my files)
  • boot
  • support
  • autorun.inf
  • bootmgr.efi
  • setup.exe

during selection on which file to keep, I choose Nothing and I continue to upgrade my system.

is my file safe? as far as I know the drive where the installer will not be affected but I'm not so sure about it.

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    I also thought that the files where the Windows Installer won't be affected during the upgrade, I hope someone clarify it. – Seynal Jan 17 at 16:07
  • If you choose nothing, your personal files will be deleted, since your current installation will be wiped. The only files that will be migrated are those personal files in your user profile directory. Files outside of your user profile shouldn't be touched, but if you cannot lose them, you should back them up. – Ramhound Jan 17 at 16:33
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Yes, your backup file(s) will be safe.

Usually, Windows Installer will extract any necessary installation files to a (hidden) temporary directory and delete them upon installation.

In any case, Windows Installer will only remove the files it extracted/used for installation and not any others (such as your backup files).

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