Sub Maybe()
Dim lr As Long
lr = Cells(Rows.Count, 3).End(xlUp).Row
Application.ScreenUpdating = False
With Range("C2:C" & lr).Offset(, 2) '<----- Column E is empty and free to use
.Formula = "=COUNTIF(R2C[-2]:R" & lr & "C[-2],RC[-2])"
.Value = .Value
End With
With Range("E1:E" & lr)
.AutoFilter Field:=1, Criteria1:=">1"
.Offset(, -2).SpecialCells(12).ClearContents
End With
ActiveSheet.AutoFilterMode = False
Columns(5).ClearContents
Application.ScreenUpdating = True
End Sub