<Table> © Brain <Tr> <Td_colspan="2"> The boot sector of an infected floppy </Td> </Tr> </Table> <Tr> <Td_colspan="2"> The boot sector of an infected floppy </Td> </Tr> <P> Brain is the industry standard name for a computer virus that was released in its first form in January 1986, and is considered to be the first computer virus for MS - DOS . It infects the boot sector of storage media formatted with the DOS File Allocation Table (FAT) file system . Brain was written by two brothers, Basit Farooq Alvi and Amjad Farooq Alvi, from Lahore, Punjab, Pakistan . </P> <P> Brain affects the IBM PC computer by replacing the boot sector of a floppy disk with a copy of the virus . The real boot sector is moved to another sector and marked as bad . Infected disks usually have five kilobytes of bad sectors . The disk label is usually changed to © Brain, and the following text can be seen in infected boot sectors: </P>

Who made the world's first computer virus