Macbook Pro won't finish loading after boot and password

Right after I installed McAfee Virus Scanner for Mac and restarted my laptop it won't load all the way after I put in my pasword. It's stuck on the space screen that comes pre-installed, right before my desktop appears. I went into safe mode and dragged the new application into the trash and did the disk utitlity. It finished an it says the disk is ok. The battery is charged. Is there something else I need to fix? What is going on?

You have a hardware failure. Could be the drive itself or as has happened on a lot of 2009 model MBPs the cable that goes from the drive to the logic board has failed.
For either you will be better off taking it into an Apple G Bar and having it looked at. Note to the Apple staff that it may be the cable and not the drive.
If you are in the mood to test it yourself then remove the drive from inside the case and connect it to the system with a SATA to USB adapter and at stratup hold down the Option key and select the USB connected drive as the Boot Source. If the system boots off the drive then it is the cable. If it doesn't boot off the drive or the drive isn't even listed as a boot source then the drive has failed. Whichever one it is, Replace that part.

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Macbook Pro won't finish loading after boot and password

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