There are thousands of computer viruses. Different viruses have different infection strategies. Viruses and their level of destructiveness vary widely. Virus behavior can range from annoying to destructive. Viruses can be categorized on the basis of what they infect and how they infect.
- Some common viruses:
- Boot Sector Virus
- File Infection Virus or Program virus
- Message Carrying Virus
- Multipartite Virus
- Stealth Virus
- Self-Modifying Virus
- Polymorphic Virus
- Metamorphic Virus
- Macro Virus
- Script Virus
- Parasitic Virus
