web hosting buy&review&best Q&A

All of the webhosts when signing up, offer transfer of your website from the original host’s servers to their own servers. Does it matter if the original server was Windows based, and can that easily be transfered to a UNIX/Linux based server?

If I had an existing domain with a default hosting service, can I switch the domain to another hosting server? What are the steps to do this. Will there be a fee associated to that?