When I turn my Dell Precision 3500 laptop on and try to get into Ubuntu, I can't do so. I have Ubuntu 20.04.1 LTS and Microsoft Windows 10 on laptop. Many words appear on screen when I try booting to Ubuntu. Among what appear to be the most diagnostic are these: "The root file system on /dev/nvme0n1p6 requests a manual fsck" and "Busybox v1.30.1 (ubuntu 1:1.30.1-4 ubuntu 6.2) built-in shell (ash) Enter 'help' for a list of built-in commands." I have no idea what a "manual fsck" is. I enter "help" and get a paragraph of what appears to be mainly nonsense.
Can someone help me figure out what to do to get Ubuntu back up and running?
P.S. I tried following the instructions I was given in the response below, without success. I guess I don't know what some of the terms mean. What does it mean to "boot off a Unbuntu installer drive?" is that a different drive than the one that I'm having trouble with? Also, what does "use fsck (see man fsck)" mean, and how do I do it. Lastly, I did go into Windows and search for "Fast Boot" in settings so I could disable it, but I couldn't find it there. What should I do?
"fsck is a command-line tool for find errors in, and repairing, damaged disks. You should boot of a Ubuntu installer drive, and use fsck (see man fsck) to repair your disk, and post your results. Also make sure you have disabled Windows Fast Boot in Windows settings."