If you already have Korean font viewer :

In explorer menu : view -> encoding -> Korean

or

Instructions for downloading Korean fonts - common in Explorer, Netscape -
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To read Korean fonts, you should download 'Microsoft Global IME 5.01 for Korean'.

Download

On the site

Choose "Korean" and then Click [NEXT].

When you see the next page, click [NEXT] again.

Then a dialogue box will appear.

Choose "Save on the disk" and then click "Okay".

Internet Explorer version 5

When downloading is complete, run the program. And you can see the Korean version.

Internet Explorer version 4 or lower

When downloading is complete, double click the "ms haime.exe" file on the chosen directory.When the dialogue box appears, click [Yes].When installation is complete, you should reboot the system.

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Netscape Navigator

If you're a Netscape user, you should change the basic settings of the browser.
Click [Edit] and then click [basic settings].
Then a dialogue box will appear.

Click [Fonts] and then choose "Korean", "MS Gothic", and then click [Okay].