This is a destructive virus which was reported to be heavily in the wild in Israel in early 1996. It was also found in the wild in Finland in December 1996.
The virus activates on random dates. When this happens, it will display this text and overwrites drive C:
Alfons ! Synchronizing drive C: (Do not interrupt this operation !): 100% Done.
A later, 1536 byte variant is also known.
Disinfection & Removal
Description Created: Mikko Hypponen, F-Secure