Pc Memory Diagnostic Why Does My Laptop Fail Loading Windows Vista?

Why does my laptop fail loading Windows Vista? - pc memory diagnostic

As of today, my laptop does not load Windows Vista. I recommend that (the possibility of recovery, which brings me to the boot options like Repair System Restore Windows Complete PC Restore, Windows Memory Diagnostic Tool, Command Prompt, CEO Acer Recovery Yes, my laptop is an Acer). I tried # 1, 2.3, but none of them solves the problem. What should I do?
Thank you for giving me advice.