This is a variant of the Jerusalem virus from Australia. Some reports indicate it may cause a slowdown of the system, but this has not been confirmed. The major difference between this virus and the standard Jerusalem virus is the use of a simple encryption in the Slow virus.
Allow F-Secure Anti-Virus to disinfect the relevant files.
For more general information on disinfection, please see Removal Instructions.
A 2126 byte variant from California.
This variant is much longer, 4112/4117 bytes, and uses a different encryption method. As it was found in Australia, and resembles the Slow virus, it is classified as a variant, although it has not been analyzed yet.