Try hosting yourself with apache server on you home computer, its free and a great place to start to get to know computers.

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Try this site, very easy to follow and they also have lots of other tutorials.

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that anyone tries to host their own website at home.

Apart from the obvious fact that you'll have to leave the computer running on a 26/7 basis, there are all kinds of security risks invoilved.

You can indeed set up a web server on almost any PC, but as has already been pointed out, there's a little more to running a successful (and safe) web server than you seem to appreciate.

Running public access web servers is fraught with potential security problems, and apart from anything else you may find that you are in breach of the terms and conditions of the agreement you entered into with your ISP if you operate a web server on a domestic connection. You may certainly find yourself faced with bandwidth throttling if your traffic figures reach appreciable levels.

I strongly advise against doing it unless there's a compelling reason - there are dozens of professional hosting companies which can provide safe,fast, inexpensive hosting packages.