Mavericks seems to have killed my MacBook Pro (mid 1010)

My MacBook Pro (mid 2010) had been working normally. I just installed mavericks. Now the computer won't start. After the apple icon shows up, part of the screen suddenly becomes black and about 20 lines of code appear. The computer then restarts, and a window appears stating that "The computer has restarted because of a problem" with no further information. Then the cycle continues, with the operating system never starting up.

Obviously I wish I had never installed mavericks. Does anyone know how I might get machine running normally again?