Tried the latest nVidia
driver for W 7, 185.85_desktop_winvista_32bit_english_whql, no joy. Symptoms are primary display looses sync and secondary display is fine. If you unplug the secondary the primary will remain out of sync and you must restart. The instant you plug in the secondary the primary looses sync again. Uninstalled the 185.85 software then reinstalled the 158.21 all worked great. Not sure why nVidia has fixed this yet, but, without this old
driver multiple displays do not work on my system. Device manager indicates the working
driver version is 7.15.11.5824.