Recently I have noticed that mIRC has made the taskbar and the menu bar at the top of the screen disappear. I am not sure what has caused this or how to fix it. The image below will show you what has happened.

Hello,
try this:
/menubar <on|off>
/toolbar <on|off>
/treebar <on|off>
/switchbar <on|off>

The most common reason for this is that you have enabled full screen mode. If you move your mouse to the top of the screen, the mIRC menubar should appear. You can then choose the "View" menu and select the "Full Screen" option to enable or disable it.

Thanks. I thought it would have to be fairly simple. Must have been an errant keypress. All fixed now so thank you again.