Okay so, to answer the first thing I have been suspecting firefox for a while but it's also doing for weird things like taskmgr, which go up to using 50cpu. I only have one plug-in installed on firefox, and it's flash
Also I've done the msconfig thing only leaving on my touchpad driver and my anti-virus.
I had Avria for anti-virus, thought that may have been the problem so after the system recovery I installed microsoft security essentials.
As for the action center, it says to back up my files and turn on Windows Security Center.
I will try the CCleaner, I've had that program before so I'll give it another shot.