exm52626,
First run Delete Print Jobs then restart your computer. Stuck print job(s) cause all kinds of printer issues.
Make sure the printer is not usb cable connected.
Lexmark recommends...
Start, all programs, Lexmark X3470, uninstall
(Please be patient as the printer uninstalls)
Restart your computer. Make sure the printer was removed. Manual Printer Driver Removal
Download CCleaner and install it. Click on registry. Scan for issues. Click on fix selected issues. It will ask if you want to backup registry, save yes and save it to your documents.
Restart the computer.
Make sure you have all the Windows Updates, especially .net framework, needed to run many applications and Download Latest Java
Restart your computer
Go and download the drivers for your printer from here...(I would try the Vista 64-bit drivers in the Vista Compatibility mode)
Install the drivers first, You should get a message, the printer is not connected. Connect the printer at this time(powered on)
Remember virus programs and firewalls will blcok communications.
Rick