The Code

Just type the following script into Notepad (with Word Wrap disabled) and save it with a .vbs extension as LogoffIcon.vbs:

Set OpSysSet = GetObject("winmgmts:{impersonationLevel=impersonate,(Shutdown)}" & _
"//./root/cimv2").ExecQuery("SELECT * FROM " & _
"Win32_OperatingSystem WHERE Primary = true")

ianswer = MsgBox("Did you save your data first?"+vbLf++vbLf+ " LOGOFF?", _
vbCritical + vbYesNo, _
"Logoff?")

If ianswer = vbYes Then 'If OK, shut down

For Each OpSys In OpSysSet
outParam = OpSys.Reboot

If err.number <> 0 Then
WScript.echo "Error number: " & Err.Number & _ 
vbNewLine & _
"Description: " & Err.Description
End If

Next 

Else ' user selected cancel
MsgBox "Logoff Aborted", , "Logoff Aborted"

End If

Copy the script to a folder on the user's machine and create a shortcut to the folder on his desktop. Then, when the user needs to reboot his machine, he can double-click on the shortcut and a dialog box (see ) will suggest that he save his work before logging off.