For sc i don't install the driver....
Installing video drivers
-require elevated admin access
-need to be done on the real display ( doesn't work with RDP)
In most cases you use sc to get access the a user PC, for a limited
time and action....have to be simple and work for all users.
The latest SC disable aero, the the speed is the same on WIN7 as on XP and the hook dll does there job.