Error (10061) is an internal communication error which
appear if you have
installed a firewall.

The communication between the components of O&O Defrag
(e.g. the Agent and the
GUI) is based on TCP/IP. This communication takes place
only internally, and
doesn't access the internet. However, most firewalls are
programmed to
recognize internal IP communication, so you receive a
warning message.

You don't have to turn off your firewall! Simply open up
port 50300. Since O&O
Defrag automatically checks access priveleges, there can
be no external access
over this port even if you are connected to the internet.