AS SALAM O ALAIKUM

Ma jab apna computer ON krta hun, tow aik ERROR "DISK BOOT FAILURE, INSERT SYSTEM DISK AND PRESS ENTER" ye show hota hai,, jab k koi disk nahi hai, windows bhi normally install hain, na hi ma nay BOOT lagaya hai, SETUP mai ja kr bhi check kia, koi changes nhi hain..

YE PROBLEM KBI KBI HOTI HA,, 2 OR 3 times restart krnay pe phir normally OPEN hota ha,,,

Lakin problem INCREASE ho rhi hai.....

KINDLY HELP ME.....