In my company, we have a policy to disable USB Storage by disabling the USBSTOR.SYS via GPO.
Strangely, some computers (not all) seem to be immune from this GPO, even though GP Modeling and GP Result indicates that the USBSTOR.SYS-disabling GPO is in effect.
Upon checking the installed software, we discovered that there are some 3rd party drivers installed, one of them a "USB 3.0 driver" or something like that. When we asked about it to the SI that built our system, they said that that driver is part of the system's drivers (we're using Lenovo desktops).
Is it possible that the 3rd party "USB 3.0" drivers be the cause of the GPO 'failure'?
If yes, how do I disable this driver?
If no, what else could be the cause?
The clients are all Windows XP
The DCs are all Windows 2008
The users that use the GPO-immune PCs all have no Admin rights