Originally Posted by phil.d.g
Chances are it's a hardware problem such as overheating.
Do you do any other CPU intensive tasks on this machine, for exmaple compiling large software packages? Does the same happen?
No I do not, I haven't actually compiled anything on my Ubuntu.
When you say "Hardware Problems" do you mean specifically Overheating? or something worse? I only up to recently had this issue with Handbrake on the Linux version. I used to use windows. Question is, would it be something wrong with the motherboard?