Windows 10: HP Pavillion laptop won't boot...

My grand-daughter has a HP Pavillion laptop which she brought over this morning as it is showing Recovery. It looks as if Windows has not loaded correctly. It then gives a choice of Restart my PC or See Advanced Repair Options. Ive had a quick look through these and tried the restore option but it asks for a password, however when we input the password it says its not the correct password. I also tried to start it in safe mode and also in command prompt mode as I thought I could disable the screen where it asks for the password but it wont let me use either till I input the password! So Im going around in circles. Assuming theyre available (without inputting a password) Im loth to try some of the other options as she has College work on the laptop which she is afraid of losing. Very occasionally the laptop will boot to the password screen but then it does not recognise the password. On one occasion it has actually booted to the desktop, having taken a long time to get there but then failed shortly afterwards. I say fail as it did this when I was not in the room and it had returned to the Windows has not loaded correctly screen or something similar. I am not particularly computer literate so please be tolerant! Thanks for any ideas

:)

 

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