Lexmark is not officially making any driver for the X83 that will work with Vista because its a 32 bit printer and Vista is 64 bit. Sounds like some BS to me. So, I have the same problem, a perfectly working printer and an incompatible OS. My Mom was using an old mac and had an X83 printer which she loves. She now has a new PC running Vista. Only now, I have the problem of how to get the X83 to work with Vista. Supposedly the lexmark 5200 drivers will work. My suggestion is to power off and unplug the USB cable to the X83, and manually remove any driver(s) related to it that may have been installed using the system control panel device manager. Then attempt to install the xp driver for X83 per the post below. I'm going to then plug in the USB cable and power up the printer and see if it works (it probably won't) but I'm hoping it'll then cue itself looking for the 5200 series drivers which supposedly do work according to one post on MS forum, I quote:
"After reading all these posts I was both discouraged, but more determined than ever to get my X83 to run on Vista. I have to say the determination payed off! That's right...I just both scanned and printed 7 pages on my X83 running on Vista!!!! Here's what I did. I first installed the XP driver for X83 hoping I could dumb my laptop down to make it run on an XP version....no luck there, but when I did that, my laptop recognized the X83 as a Lexmark 5200 series which is also an all in one. I thought, well, if that's what it wants, that's what I will give it. If you go to the Lexmark website and look under downloads/drivers, there is a list that shows all compatible OS. The 5200 series is listed here with a Vista compatible driver. Once I downloaded it and went through the installation wizard....it worked LIKE A DREAM!!!! I hope this helps all of you as I also understood and felt your frustrations! Good luck!!!"
article source http://forums.microsoft.com/technet/showpost.aspx?postid=503767&siteid=17&sb=0&d=1&at=7&ft=11&tf=0&pageid=1
Lexmark 5200 series drivers http://www.lexmark.com/lexmark/sequentialem/home/0,6959,204816596_1019285789_0_en,00.html
xp driver http://downloads.lexmark.com/perl/downloads/downloads.cgi?ccs=229:1:0:0:0:0
you'll have to type in a search for the driver enter X83 in the field, follow the steps...