Hi,
I must say that this is not true. At this time there are no genuine Windows 8 drivers provided by lexmark (ok, true). I just simply wanted to installthe win7 drivers (64 bit) onto mysystem, but windows 8 stated, that this driver would not be compatible and denied the installation.
Then I just simply applied the normal procedure that seemed logical to me: in the properties of the setup-file, I selected the compatibilitie-mode for windows 7 and and granted administrative rights when the file would execute (right click on file - context-menu - compatibility tab).
Then windows 8 had no more complaints and installed the software, found the printer over wifi and printed the test page without problems. At this point I did not check the fax-feature or any "scan-to" functions etc. but printing is fine. I assume that the other funtions will work as well although not tested yet.
Regards