I have automated sheets to be protected by a global variable g_mStrPW.
However, when trying to unprotect individual sheet, the sheet gets
unprotected without prompting for password. This is bad and made protecting
sheets meaningless.

Here is the code used to protect all sheets.

Private Sub LockEM_Click()
Dim i As Long
Dim WS As Worksheet
g_mStrPW = InputBox("Password:")

On Error GoTo MyErr
For Each WS In ActiveWorkbook.Worksheets
WS.Protect (g_mStrPW)
If WS.Protection.AllowUsingPivotTables = False Then
WS.Protect AllowUsingPivotTables:=True
WS.Protect AllowFiltering:=True
End If
Next
MsgBox i & " errors found", vbInformation

Exit Sub
MyErr:
i = i + 1
Resume Next
End Sub