Take ownership of a file or folder.

itsmine.ps1

<#
.SYNOPSIS
    Take ownership of a file or folder.
.NOTES
    takeown.exe and icacls.exe (both included in Windows) need to be in $env:PATH

    If a folder is specified, all files and subfolders of that folder will change ownership.
#>

#Requires -RunAsAdministrator

[CmdletBinding(SupportsShouldProcess)]
param ([Parameter(Mandatory)][string]$Path)

$ResolvedPath = Resolve-Path -LiteralPath $Path -ErrorAction Stop

'takeown', 'icacls' | ForEach-Object {
    Get-Command -Name "$_.exe" -CommandType Application -ErrorAction Stop | Out-Null
}

# Support -WhatIf and -Confirm
if ($PSCmdlet.ShouldProcess($ResolvedPath, 'Take Ownership')) {
    if (Test-Path -LiteralPath $ResolvedPath -PathType Container) {
        takeown.exe /f $ResolvedPath /r /d y
    }
    else {
        takeown.exe /f $ResolvedPath
    }
    icacls.exe $ResolvedPath /grant administrators:F /t
}