I have a 2017 MacBook Pro running macOS High Sierra. Today, System Preferences app suddenly stopped responding, followed by every other app whenever I had them active. Force quitting them was useless, since they would freeze once I re-opened them. Even the Mac toolbar froze when I had my cursor on it, preventing me from restarting my Mac from the menu.
I held down the power button to restart it, but the problem repeats upon reboot. Not just apps, but notifications, the touch bar, and spotlight inevitably freeze. Console crashes whenever I open it, so I can't get info out of it. Activity Monitor briefly shows that the CPU load is very high, before it crashes itself.
I've already tried resetting the NVRAM and SMC. How do I resolve the issue?