iMac wont go past the login screen?
The computer worked fine before. Now when I sign in at the login screen the computer won't go past the gray screen with the Apple logo and the spining circle. After a minute or so the Apple logo turns into a circle with a slash going through it sort of like "No Smoking" sign and this continues indefinatley. I've looked for help but couldn't find any, I've also tried holding "Shift" after the boot up chime but it didn't seem to work as nothing happened and it took me to the login screen once again. Im using the Guest account and it only gives me access to Safari
iMac, Mac OS X (10.7.5)