I'm not clear on this, but seeing as no-one else has commented yet,... I'm guessing the standard user accounts dont have sufficient rights to modify the registry. I have an onboard ati rage (or similar) on my laptop and ctrl-alt-delete reveals a couple of ati processes, one running with SYSTEM and one with USER. If the process only shows up one time (as admin) and is not linked to actual drivers you could use group policy > software restriction to prevent the applet from running. However, if it is tied to the drivers you will have to look for the registry key that changes and maybe create a logon script for your users (does that run as SYSTEM?) If you cant find the key by hand, you'll need some 3rd party installation monitor that can take snapshots of the registry. Create a new (temp) admin account, snapshot on first boot with helper enabled and then again after disabling. Hope that kicks of some ideas on this thread.