Strange printer driver problem

I'm looking for help for a strange problem: I have WP X5 on Windows 7 Home Premium. Suddenly, when I print, whether to printer or publlishing to PDF, only the left half of the page prints. I can't even imagine what to do about this. Should I just reload? Any thoughts? If you can help, thank you very much. Adding to this issue: today I ran the "Repair" routine from the install disk; it had no impact on the printer driver problem.