This is a video tutorial in the Software category where you are going to learn how to revert to the Fixedsys font using mIRC. Click on the channel icon and select font. Here you can select the font and the size and then click OK. If you have Windows XP or older version of Windows, you can type in fixedsys in the font window, select the size, click OK and the fixedsys font will be selected. But if you have Vista or Windows 7, this will not happen. So you bring up the Windows explorer and in the address bar type in %appdata%. It goes to a roaming folder. Scroll down and double click on mIRC. You can now watch the video for further instructions.