My PC DOES NOT WORK!

Medo123

Prominent
Apr 3, 2017
1
0
510
Good evening. I have one question. When I turn on my Toshiba PC it shows the boot menu with options:
1. Harddisk
2. P4-HL-DT-ST DVDRAM GT20N
3. Floppy
4. Realtek Boot Agent
I do not know what I must do to normally start the computer. I tried to exit with ESC but it says that the exit collapsed. I also tried to turn off the computer and try to turn it on again but the boot menu shows again.
Please help me because I don't know what's wrong! You can contact me on Gmail account [don't post your email address on any forum]
Thank you very much!!