Telnet, is basically a protocol for providing a simple communication method between a client and server.
What I have asked you to do is to attempt a connection to bowgen.co.uk, which is my server, on port 80, which is the default http port used by browsers. I also asked you to repeat the command using port 110, which is the default port for POP email. Both ports are open on my system, and I would expect you to be able to establish the initial connection using the telnet command.
The result of the last test shows that you can initially connect on port 80, but then, for some yet unknown reason, you can't. The test also shows that you can connect using port 110, even when your connection appears to have dropped.
It could suggest that some kind of firewall is becoming active and blocking the port. It could also be a damaged networking component or a trojen/virus.
You say that there is no firewall installed/enabled, so I can only assume some kind of damage to the TCP stack. You could try uninstalling the TCP protocol and then re-installing it. You might also want to try the
winsock fix, although I normally only use this if networking has totally failed. Before doing either, open a command prompt and type
ipconfig /flushdns and press Enter. This will clear any junk from the DNS cache.