A Virus that infects the first part, called a sector, of your hard drive. This first sector is called the boot sector and it is what your computer uses to start. A boot sector can also be on a floppy disk, if you use a floppy to boot your computer.

This Virus can stop your computer from booting and can eventually infect your hard drive causing it to reformat itself. This can cause total loss of information on your hard drive.

These are exactable files that can infect the programs on your computer. These Viruses can continue to spread to other programs and render these programs unusable.

These Viruses infect Document, Data, files. If you use Macros in your documents you're at risk for this most common Virus. It can erase or destroy your data files.