My windows installation died on me (Patreon)

So yeah. I was using my pc. I was doing nothing. Just turned it on. Then it froze and sent me a blue screen of death. Then when it restarted, we'll... It didn't. Now it says that the os is not found. Bios detects the ssd but it just won't start. I upgraded from windows 7 so I don't have an installation CD to fix it. So I have no idea how to fix this and I don't know until when I'm gonna have pc access. Please be patient for I might take a bit to finish some of the art I already owe. And also if you know what could I do to fix this, it would be greatly appreciated...