What type of damages can be caused by viruses to your computer?

A virus can damage our computer in the following ways:

1. Some viruses may delete or damage random documents or specific files that are crucial to the operating system.
2. Viruses can run in the background, without being seen, and may cause the computer to run extremely slow.
3. Some forms of viruses may infect the email program and spread themselves to the contacts in the address book.