What does this mean? It comes up on start up but when I click on the message it doesn't give me any further info:
FAILED TO CONNECT TO A WINDOWS SERVICE
Windows couldn't connect to the Windows All-User Install Agent Service. This problem prevents standard users from signing in.
As an administrative user, you can review the system event log for details about why the service didn't respond.
I think you need to place your cursor (assuming you're using a mouse) in the lower left-hand corner of your screen. Next, right-click on the little picture that appears and you should see a drop-down menu.
Select "Event Viewer" which hopefully will help you identify the cause of your problem. Sorry I can't be any more helpful than this.