Thanks for the information!
When you start the computer, are you able to access the logon screen where you need to click on your user name and type the password?
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Please restart the computer and access the logon screen. If it asks you to select your user account or to type the password, don't do that, but check if you can see the power icon located in the bottom right corner of the logon screen.
If you see it, click on the power icon and then press and hold down the Shift key on your keyboard, and while still holding, click on Restart. Continue to hold the Shift key until you see a blue screen that says "Choose an option".Let me know if you were able to access the "Choose an option" screen.
Were you able to follow the instructions in order to get to the "Choose an option" screen?
If so, please reply here so that I can let you know what to do next.