One of the variants generates an endless loop to the partition table,
making PC crash when it tries to boot from a clean floppy which has
MS-DOS v4.0 - 7.0. To overcome this, use PC-DOS 7.0, MS-DOS 3.3x or
a non-DOS boot floppy. Contact F-Secure anti-virus support for
Note: Rainbow is also an alias for the WordMacro/Colors virus.
[Analysis: Mikko Hypponen, F-Secure]