Most computer viruses look for certain files or folders on the computer they are infecting in order to propagate. For example, a virus might look for executable files to infect, or for files that contain personal information like user names and passwords. Some viruses also look for certain Registry entries that can help them spread more quickly.

Viruses can also be programmed to look for specific types of data, such as pictures, music, or videos. This is often done in order to steal the data or to use it to spread the virus to other computers.

It’s important to be …