Do not open My computer but computer power on then showing NTLDR is missing

lalapur

Honorable
Jan 16, 2013
2
0
10,510
do not open My computer but computer power on then sowing NTLDR is missing, Press ctrl + Alt+ Del to restart Then Realtalk RTL8111B/8111C Gigabit is boot agent press Shift F-10 to configure..............
Boot option manu
SATA : Sony - DVD RW DRU-870S
SATA : SAMSUNG HD 321 HJ
Select menu, Enter select submenu, Esc,Exit

Then anserw: Reboot and select prope Boot device or insert Boot media in selected Boot device and press a key...
Please this problem is solv. how can start my pc.