Doggo

Hi I need help with my computer, I recently booted up my pc and noticed that my screen is completely black with a cursor (taskbar flashes sometimes) I tried going into task manager but it will not overlay the black, I noticed in regedit my file explorer.exe is set to (cmd // -4 cmd.exe) Or some random file, I also tried going to a restore point but It is still not working, How can i remove or fix this? I need this fixed asap