MacBook Pro won't boot up
Yesterday I got a message on my macbook that I needed to reboot. I did so and again received the same message upon re-booting. I re-booted again but this time Apple logo would appear but never progressed to the login. I made an appointment with the Apple Store and took it in. Naturally, it booted right up and the Apple Store employee looked at it and pointed out that my computer was nearly full. I was told that this might be the cause of my problem. So I brought my computer home and booted it up. I went exploring in my hard drive and deleted a few small items that I did not need - I also emptied the trash. I plugged my external HD (that I've used for years to back up stuff from my PC) into the Macbook. I attempted to access the external HD and the computer froze up and I rebooted. Upon login I decided simply delete various files that I really didn't need. But try as I might I could NOT empty the trash and the computer froze up again. I turned off the computer and again this morning tried to boot up. I got the reboot message again. I need to mention that I bought this computer used and that it is an older model Macbook Pro and that I do not have any disk that came with the original machine. The only thing on the computer that I'd be concerned about 'saving' is some music but I assume that anything I bought on iTunes with my account I could re-download upon fixing my computer.
MacBook Pro