Did you upgrade to Mavericks or is this a new computer?
If you upgraded your operating system from an earlier OSX, you may want to want to try uninstalling version 10 and reinstalling it.
There is no reason version 10 should not work on any of the recent OSX versions.
You also may want to look into these solutions.
Thank you for the help. I upgraded, so I will try your suggestion about uninstalling and re-installing.