a shot in the dark : did you update directx using June 2010 redist ?
I'm not sure, but I think so. For security I downloaded and installed again, but with no result
Online says it supports either OGL 4.1 or 4.2.. if i recall correctly 4.5 (though i've seen some that say 4.3) is required for OGL
Thanks to all who helped, I uninstalled the drivers and reinstalled the latest, now it's working perfectly