New install of XP, TLDR not found message.

[spellofmaya]

Ok so this is the first time i've installed on OS, when I first turn on the PC it asks to boot from disc, if the XP disc is in the tray it loads fine, but if it's not then a message comes up saying TLDR not found press CTL+Alt+Del to restart. This may be something simple I just dont know about but what do I need to do to boot without the XP disc in the tray.

Thanks.