This virus activates on Thursday the 12th, popping up a window with a warning that the next day is Friday the 13th. It pretends to be an anti-virus program, called VirCheck V1.2
The virus avoids infecting programs with names containing the following patterns:
SCAN (McAfee's SCAN) CLEAN (McAfee's CLEAN) VIR (Various anti-virus programs) ARJ The ARJ compression program FLU FLUSHOT+ from Ross Greenberg COMMAND COMMAND.COM
Allow F-Secure Anti-Virus to disinfect the relevant files.
For more general information on disinfection, please see Removal Instructions.