Problem:
Sometimes when a computer runs slow and is restarted, it will get stuck on a screen like this:
Solution:
Run the command "fsck -fy /dev/sda1" (this command is case sensitive and has two spaces. please include those, do not include quotations) and press enter. This will run a bunch of code. Let it run and once you see "initramfs" again at the bottom, hold down the power button on your computer to turn it off and then turn the computer back on. Then, the computer should boot up properly.