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.
Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.
Description Created: Mikko Hypponen, F-Secure