How to access hosting files through Windows Explorer

Essentially you can not in the normal way. This would be possible in a hosting that has some form of communication between the servers, something like the SMB , for example, but you would only get on a server of yours, in shared hosting no one will allow.

What you can do is to use Windows Explorer as an FTP client. Do not recommend, the experience is bad, but you can access your server, if you have an FTP account enabled through the ftp://usuario@servidor address, will ask for the password. How can not configure anything may not work in certain situations. You can not multiple accounts on the same server remembering password.