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I have a following scenario: 1: Create a bunch of files 2: Call some external app that processes all files with different creation time since last snapshot 3: Delete files 4: goto 1 It turned out that windows doesn't guarantee that it will change creation time when user creates a file, deletes it and than creates a file with a same name. I wrote a small powershell script that verifies this: ls | Remove-Item $fileListOld = @{} foreach($i in 1..1000) { $fname = [string]::Format("{0}.txt", $i) "tst" >> $fname } ls | % { $fileListOld[$_.Name] = $_ } ls | Remove-Item foreach($i in 1..1000) { $fname = [string]::Format("{0}.txt", $i) "tst" >> $fname } $fileListNew = @{} ls | % { $fileListNew[$_.Name] = $_ } $count = 0 foreach ($fname in $fileListNew.Keys) { if ($fileListNew[$fname].CreationTimeUtc -eq $fileListOld[$fname].CreationTimeUtc) { Write-Host Same creation time -ForegroundColor Red Write-Host $fname -ForegroundColor Red $count++ } } Write-Host $count Output: ... ... Same creation time 241.txt Same creation time 944.txt Same creation time 908.txt Same creation time 631.txt Same creation time 175.txt Same creation time 798.txt Same creation time 192.txt Same creation time 961.txt Same creation time 476.txt Same creation time 566.txt Same creation time 945.txt Same creation time 681.txt Same creation time 880.txt Same creation time 162.txt Same creation time 634.txt Same creation time 746.txt Same creation time 442.txt Same creation time 35.txt Same creation time 96.txt Same creation time 771.txt Same creation time 787.txt Same creation time 972.txt Same creation time 642.txt Same creation time 495.txt Same creation time 625.txt Same creation time 666.txt Same creation time 660.txt Same creation time 6.txt Same creation time 593.txt Same crea

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