The connection timed out error isn't a dangerous error, nor is it an infected file that can harm your computer. This message primarily serves as a warning that the system has been unable to establish a connection with the server.
IPv4 and IPv6 are the two versions of IP. IPv4 was first released in 1983 and is currently widely used as an IP address for a variety of systems. IPv6 was created in 1994 and is referred to as the "next generation" protocol.