There is no virus by this name. Distributed.net is an organization
that distributes a client that can be used to calculate huge calcutions
when a large number of machines is running the client.
Some users have created trojan horses to drop this client to unsuspecting
users, effectively using their machine for their own needs.
The RC5 client's name dropped by Bymer worm is DNETC.EXE. In case
you have Bymer worm infection, you have to delete both worm's
file and RC5 client from your system. See Bymer worm description
for more info.