I just installed Elementary OS and completed all updates. It is installed on a Dell Insprion 1520. All went well until I added two other users. When I am logged in as one and wish to log out to login as another user it fails to give me the login greater screen.

I get a black screen with the following:
Starting Preload * Stopping save kernel messages
*Starting ansc(h)ronistic cron
*Stopping ansc(h)ronistic cron
*Checking Battery State...
*Stopping System V runlevel compatibility
*Stopping restore sound card(s') mixer state(s)
*Stopping clod plug devices
*Stopping log initial device creation
*Starting configuration network device security

Then it just sits there. I press Ctrl Alt Delete to reboot and it still fails to boot up. I get the Elementary splash screen then it goes black with:

Starting preload
*Checking battery state...

Then nothing. Sometimes if I restart or turn power off then back on I can progress to:

*Starting ansc(h)ronistic cron
*Stopping ansc(h)ronistic cron
*Checking Battery State...
*Stopping System V runlevel compatibility

Then nothing. If I power the computer off for a 15 or 20 minutes and then try it will boot just fine. I will still be unable to logoff and back on again.