ASwr

    @echo off
    title Computer Virus Archive
    echo           Computer Virus Archive
    echo           By Javanese
    echo -----------------------------------------------
    pause
    echo  Virus.9x.CIH
    echo  When CIH infects files, it checks to see whether there are enough gaps to completely store its code,
    echo  rather than simply writing its code to the end of the file and increasing file size. If it has enough space,
    echo  CIH will infect the file without increasing file size. If it does not, CIH will ignore the file,
    echo  giving it better ability to further infect a user's computer without the user noticing anything.
    echo -------------------------------------------------------------------------------------------------------------
    echo  On April 26th (in the original variant), CIH activates, overwriting part of the BIOS (Basic Input Output System) and overwriting the first megabyte of
    echo  all hard disks in an endless loop, causing the computer to crash. Once rebooted, the BIOS is corrupted and will no longer display anything on the screen or
    echo  initiate the boot sequence, rendering the computer unusable.
    echo ---------------------------------------------------------------------------
    pause
    echo  Virus.DOS.Kela
    echo  the TPE classification is affixed to those viruses that were produced with the "TridenT Polymorphic Engine (TPE),"
    echo  a virus writing engine with polymorphic capabilities.
    pause
    echo Virus.DOS.OneHalf
    echo The virus gains control at bootup and
    echo creates a random encryption key, which
    echo it stores in the master boot record
    echo (MBR). It then enumerates the size of
    echo the hard drive and selects the last two
    echo unencrypted cylinders on the disk, and encrypts
    echo them using the aforementioned key. It continues encrypting
    echo the last two unencrypted cylinders until it finally reaches
    echo the middle of the disk, when it outputs "Dis is one half."
    echo to the screen.
    echo Now, the virus basically owns your hard drive.
    echo When data that resides in the encrypted cylinders is accessed,
    echo OneHalf takes control and decrypts it and then displays it to the
    echo user. However, if the virus is removed improperly,
    echo the encryption key is lost and all data is permanently
    echo damaged beyond repair and must be recovered from backups.
    pause