My macbook is stuck on the login screen after entering the password. I've been using this MBP for the past 4 years and it's been slowing down of late. However, I'm now having trouble logging in to my primary account: after I enter the password, I can proceed no further, although I still have access to the Guest account.
I've gone through some of the steps mentioned here and in other forums: resetting PRAM, reinstalling MacOS, etc. I ran disk utility and I'm getting an error. What should I do?