Malware - short for malicious software - is an umbrella term that refers to any software program deliberately created to perform an unauthorized and often harmful action.
Viruses, backdoors, keyloggers, spyware ,adware, rootkits, and trojans are just a few examples of what is considered malware.
A few years ago,it was once sufficient to call something a 'virus' or 'trojan horse', however today's infection methods and vectors evolved and the terms 'virus and trojan' no longer provided a satisfactory definition for all the types of rogue programs that exist.
Unwanted applications can sometimes be installed to your PC and cause high CPU usage. Users reported that applications such as SaveSense , WebSteroids , PremierOpinion and Relevant Knowledge can cause this issue to appear, so be sure to remove these applications from your PC. Sometimes those applications will install their own updater and sync programs, so be sure to completely remove them from your PC. Many regular applications will sometimes install certain unnecessary software, so be sure to check your PC and remove any applications that you don’t recognize or remember installing.