on the tool bar right click this and bring up task manager and look to see how many processes are running,all so if the cpu showing 100% and not droping you might find you have a virus or spyware problem,or auto update is updating that can make your pc slow up,norton antivirus the updater used to slow my pc down,
Most system and application failures are fairly easy to identify. Random failures often indicate hardware problems.
Bad RAM, overheating, and defective hard disks, in order, are the most common hardware failures in my experience.
Hardware can fail over time. Most people assume that the problem is software because they haven’t changed any hardware lately
Hope that helps, joe