I have both Windows 7 and Vista SVC Pack 2 .... (both 32 bit) and both get the black screen when loading CoX using the 186.18 drivers. I uninstalled the new drivers via the CNTRL Panel in Windows 7 ... rebooted and it reverts to 185.5 drivers (so can play CoX fine) ... left the new drivers on my Vista drive because I usually like playing CoX on Win 7 because it uses much less resources than Vista. (FYI - I can play Prototype and Left for Dead fine on Vista with the 186.18 drivers)