Randomly deleting things never ends well.
You can make an installer on USB (still need to own a USB though) - On another PC, download the
Windows 10 media creation tool and use it to make a win 10 installer on USB
Without it, you can try to run startup repair.
Start pc, let windows start to load and restart pc,
repeat those steps a few times and automatic repair should run
once it gets to end, choose advanced options
this loads a blue menu
choose troubleshoot
choose advanced
choose Startup repair - will ask for login, might fix this
you can keep using that method to get to blue menu or you can access it from installer USB
if you have a USB, you can get to menus via:
change boot order so USB is first, hdd second
boot from installer
on screen after languages, choose repair this pc, not install.
Is there anything on C you want to save?
choose troubleshoot
choose advanced
choose command prompt
type
notepad and press enter
in notepad, select file>open
Use file explorer to copy any files you need to save to USB or hdd
I would suggest trying a reset
get to blue menu
choose troubleshoot
choose reset this PC
choose keep files/settings - Files = library folders. Library folders = Documents, pictures, movies, music (the default folders that come with windows). Settings = logins and desktop)
PC will restart and reinstall win 10. You will need to reinstall all programs again