That is ony a GUI setting as far as I know that prevents Explorer from showing, but I think KiXtart should be able to access this location just fine.

Try giving some code like this a try as a normal user and I "think" it will work. Make sure the file you use is really on the test system.

Code:
If Exist ('%windir%\system32\drivers\usb8023.sys')

  'Found file you were looking for: ' ?

Else

  'Unable to locate the file you were looking for: ' ?

EndIf