This virus activates on Monday the 23rd of any month not in 1990, formatting the beginning of the hard disk. It may also delete files, as they are opened. The increase in length of infected files is not visible when a DIR command is given.
This virus belongs to the Jerusalem family.
Disinfection & Removal
Allow F-Secure Anti-Virus to disinfect the relevant files.
For more general information on disinfection, please see Removal Instructions.