Question: what are the main types of computer viruses that harm software and hardware?
Answer: Resident Virus. Resident viruses set up shop in your RAM and meddle with your system operations. ... 
Multipartite Virus. This virus infects the entire system. ... 
Direct Action. ... 
Browser Hijacker. ... 
Overwrite Virus. ... 
Web Scripting Virus. ... 
File Infector. ... 
Network Virus.