How to Fix Ps3 Freezing?

I started playing batman arkam asylem and its freezing alot. I know its not the game because its brand new and someone else played it without issue. My system has freezed in the past, usually on new games and i figure that the system is floundering. is there anyway to either clean or have it fixed? its a 40g model

Suggestion:

Try cleaning off the data you don't need off your hard drive.

If that doesn't help this guide will: http://www.ps3repair.net/fixyourps3