Installed 10.9.2 on Macbook Pro and safari crashes.

I purchased a used Macbook Pro (2010) yesterday. When prompted to upgrade to 10.9.2, I did so. After the upgrade was finished, I could not open Safari without getting an error message screen. When I click on the Safari icon, the colored ball appears and after a few minutes of swirling, I get the error message. I have done a force quit of the application repeatedly and have restarted the computer several times. The computer seemed to be fine for the short time I used it before upgrading to the new OS. I am able to use the program Mail to retrieve emails but have no way of accessing the internet without a browser. I am using a friend's computer to get help. Any suggestions?