The Mail application on my iMac is making the entire computer act up.

Question

I tried printing off my itinerary for my flight I'm taking tomorrow. The email was sent from WestJet directly to my email within the Mail application. When I tried to print the email itself, my computer started acting weird and froze, so I shut off the computer, and rebooted it (so I thought). When I turned it back on, none of the processes had stopped, and it just started back up to where it was before. My computer was no longer being recognized as my own for some reason. I originally got the computer used from a family member, and it was recognizing the computer as his, as if it had just rebooted from a previous date when he had owned the computer itself. It showed his name in all of the applications, and when I tried opening Microsoft Word to print it from there, it acted as if I had never run the application before (The previous owner never had the application installed). The default printer was not mine, although the drivers for my printer were still downloaded, and the printer was being recognized. The printer was the previous owner's. I just tried printing another document with just plain text, and it printed fine. No errors, (after I made the default printer back to mine) and nothing went wrong whatsoever. No lag time between when I clicked on print, and the actual printing of the document.
Just wanting to see if anyone has encountered this problem before I have. IT just seems weird that it would "act" as if it had booted from a previous date.
Thanks,
Brad.

Answer 1

Hey Leonard1207,
You may want to try removing your mail account from the Mail application, then re-adding it:
Mail (Mavericks): Remove mail accounts
http://support.apple.com/kb/PH14944
Take care, and thanks for visiting the Apple Support Communities.
Cheers,
Braden