Missing operating system on boot

Ulrich6

Reputable
Aug 4, 2014
2
0
4,510
Right, so a few days ago i've been messing around with Ubuntu, wanted to try it.
But i quickly got bored and wanted to install windows again, followed a random youtube video how to do this. But i never got to install windows. Because my machine boots to a black screen with a white blinking dash.
I tried to boot from my windows cd, by accesing the motherboard menu by tapping F11, but the cd also boots to the same black screen. This also counts for the usb with ubuntu installed, it all leads to this black screen.
One time, booting from the usb, i didn't get the dash but i got the 'missing operating system' message.
I think somethings wrong with the harddrive, i can't acces it from another computer as this is the only machine i have.
Is there any way to solve this?