Quote:
Originally posted by PrinceMichaelFan
I just bought a new battery so that's ok
Its old 2008 model. 15" MacBook Pro.

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This is probably the problem, your old hard drive combined with the amount of RAM you have, isn't on par for what Mavericks needs, upgrade to an SSD and max out the RAM.
Or your hard drive is going, I had that problem with my previous hard drive, my computer would freeze trying to open a folder for a good 5 minutes, got a used hard drive off of ebay for 20 bucks, and it works like new.