Missing NTLDR file! Need help!

My machine will not start without doing a boot using the boot menu. Once the machine is turned on, the Compaq screen loads, and at the bottom it reads (press Esc Boot menu) (F10 Restore console). I hold down the esc key and the boot menu window loads, I then highlight 3rd master hit enter and the machine boots up just fine. My machine came with Windows XP, so I was instructed to make two restore disk which are CD's. That's all I have. Anybody got a fix. Once I get the machine up and running everything seems normal. It just will not boot on it's own. Own it's own, I get a black screen which the message in the upper left hand corner of the screen reads Missing NTLDR file press ctl alt del.

Forget it, my bios had the slave booting first instead the 3rd master. Good job Lewg!