I've done all your instructions, there was no driver that you mentioned.
Sytuation is the same, but strange was that that I during instalation I leave my PC to do the instalation, when I came back I saw that disk status LED is not blinking and window with information that instalation was properly finished and wishes that program will be useful. When I've clicked Finish and I wanted to reboot, Avast TryIcon appears and this Error dialog pop-up.
Instalator shouldn't require reboot after instalation???
EDIT:
Of course I tried reboot after installation but it behaves the same.