>Hi to all
>
>How can I do to prevent the users from changing the default screen saver on Win 95 and Win NT?
>
>Is there a way to disable the access to the screen that let users change the screen saver?
>

If you're willing to block access to the Display Control Panel applet, you can block simple access using the System Policy Editor in both Win95 and Windows NT, as well as by restricting User Permissions on the .CPL file under Windows NT. You'll need to ensure that User Profiles and Logins are enforced under Win95, and you can still get around much of the security by bypassing the login in Win95/Win98. The System Policy Editor is available on both Win95 and WinNT distributions; I'd recommend getting the ZAK (Zero Administration Kit) from Microsoft's Web site or an MSDN distribution set, since there are additional tools availble as part of ZAK for restricting user access to things in the Desktop and Start Menu as well.

Even if you block access to the applet, you can still get at the screen saver values in the registry. NT would permit you to block access to the registry and restrict certain hives to users with specific privileges, as well as blocking access to tools like REGEDIT/REGEDT32 on a file-by-file basis. this is not an option for Win95/Win98.