Careful, Lexmark DOES NOT support Windows 7 for older printer!!!
My Lexmark X75 All-in-One is NOT supported, and won't be! So I have a 20# paper weight next my wifes tower. (HA-HA Herr_Koos!)
Check the Lexmark website: http://support.lexmark.com/index?page=content&id=OS3&locale=EN&userlocale=EN_US
I appears as if YOU are up the same creek I am! But I could be wrong.