Windows 8 Windows 8.1 Crashing Constantly

Hi, my computer keeps crashing after turning it on, and it keeps giving me The Blue Screen of Death. It's been like this for an entire week and a half, and I reset it around 3 weeks ago since it had the same problem before, and I thought it may have fixed it...but it didn't. I can't open an app or even stay still on the desktop screen without the screen freezing and the BSOF popping up. I don't have Windows recovery DVD, I've tried refreshing the computer, doing a system restore, a startup repair, and turning it off/on with different ways. It would really help if you can help me, since it have no clue if it's due to the updates, apps, or the computer's age. Thank you for reading this and I hope you can help me.