I tried to install these over the 158.24, got a blank screen when I got into Windows...
So i had to go into safe mode, re-install the 158.43 and when i rebooted into Windows, i had to click no to i want to install my drivers to upgrade.... o_O
Anyway, leason learned: Install old drivers first, do not count on the install program can do it properly
Also it says 158.42 under systeminfo in Nvidia controlpanel, but thats properly a cosmetic bug.