https://youtu.be/6ZGqKUQkWA4 You might want to turn off real time protection - PowerShell

$GetDuplicates = {
$HashList = New-Object System.Collections.ArrayList
$Duplicates = New-Object System.Collections.ArrayList
(Measure-Command {
    foreach ($item in (Get-ChildItem -File)) {
        if (!$HashList.Contains( ($Hash = (Get-FileHash $item.FullName -Algorithm MD5).Hash) )) {
            $HashList.Add($Hash) >$null
        } else {
            $Duplicates.Add($_.FullName) >$null
        }
    }
}).ToString('m\:ss\.fff')
}

for ($i = 1; $i -lt 3; $i++) {
    "`n Iteration $i"
    Set-MpPreference -DisableRealtimeMonitoring $false
    Write-Host '   Real-time protection enabled :' -NoNewline
    & $GetDuplicates
    Set-MpPreference -DisableRealtimeMonitoring $true
    Write-Host '   Real-time protection disabled:' -NoNewline
    & $GetDuplicates
}