I would like to require my users to have screensavers AND to have them
password protected. But I want them free to choose the screensaver and free
to set the timeout.

I have already learned how to do most of this using the registry key
(\HKCU\Software\Policies\Microsoft\Windows\Control Panel\Desktop).
If I set an entry in there for ScreenSaverIsSecure = 1, then I get almost
all of what I want. But the user can defeat my design by selecting None as
the screensaver to be used.

Is there any way that I can remove or disable the "none" choice from the
screensaver list while otherwise allowing users to choose the screensaver and
timeout?

Thanks for your help.
Peter Smick

Try this, worked for me in similar situation, have adjusted to your
requirements, I think.

opt ('trayiconhide',1) ; Run as background process.

; Set to suit your requirements:
$DefSaver=@SystemDir & '\scrnsave.scr'
$MaxDelay=100

do

$HasSaver=1

$IsActive = RegRead('HKEY_CURRENT_USER\Control
Panel\Desktop','ScreenSaveActive')
$IsSecure = RegRead('HKEY_CURRENT_USER\Control
Panel\Desktop','ScreenSaverIsSecure')
$Timeout = RegRead('HKEY_CURRENT_USER\Control
Panel\Desktop','ScreenSaveTimeout')
$SaverFile = RegRead('HKEY_CURRENT_USER\Control
Panel\Desktop','SCRNSAVE.EXE')

if ($SaverFile="") OR (FileExists($SaverFile)=0) then
RegWrite ( 'HKEY_CURRENT_USER\Control Panel\Desktop', 'SCRNSAVE.EXE',
'REG_SZ', $DefSaver )
$HasSaver=0
endif

if $IsSecure = 0 then
RegWrite ( 'HKEY_CURRENT_USER\Control Panel\Desktop',
'ScreenSaverIsSecure', 'REG_SZ', 1 )
$HasSaver=0
endif

if $IsActive = 0 then
RegWrite ( 'HKEY_CURRENT_USER\Control Panel\Desktop', 'ScreenSaveActive',
'REG_SZ', 1 )
$HasSaver=0
endif

if $Timeout > $MaxDelay then
RegWrite ( 'HKEY_CURRENT_USER\Control Panel\Desktop',
'ScreenSaveTimeout', 'REG_SZ', $MaxDelay )
$HasSaver=0
endif

if $HasSaver=0 then
if @OSTYPE = 'WIN32_NT' then
Run(@SystemDir & "\RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters")
endif
endif

sleep(10 * 60 * 1000) ; Check every 10min.

until 0; Stay resident

Compile with AutoIt 3.0 or higher from http://www.autoitscript.com

(Dont think this forum has a CODE option, so you might see a few wrapped
lines that will need rejoining. )