@RealAvalon , @Benjamin_Nicholas asked some very good questions to diagnose the problem. I noticed you didn't answer them. So, it becomes difficult to provide further help.
I often help friends diagnose computer problems and what helps me the most is if they tell me if there is an actual error message, what happens when it crashes, does this happen when you are visiting other websites where you spend a lot of time reading or browsing...
You can always take your computer to a local computer store where can diagnose on site... Best of luck!