What should I do I having an issue regarding the OS glitch it showing the following problems

[Windows Server]

Whenever i open the laptop it showing that default boot device is missing or boot failed and then i press ok it forward me to bios if I enter in "continue" icon it forward to Balck screen where is written " No bootable device -- please restart system". Afterwards when I shutdown device from physical button it shows again default boot device is missing or boot failed and then i press ok it forward me to bios setting and repeating again and again.

Continue reading...