This virus adds 1-16 extra bytes to programs before it infects them. If it infects a very small file, it can sometimes not be removed. Two variants, 789 and 801 bytes long are known. The virus activates on September 18th, after 7:00 AM, overwriting the hard disk.
Allow F-Secure Anti-Virus to disinfect the relevant files.
For more general information on disinfection, please see Removal Instructions.
Probably an older variant - only able to infect EXE files.