Blank grey screen on windows 10 old hp laptop

[Luv Rookie]

I am trying to use my old hp laptop and when I opened it up and got everything I needed I tired resetting it. Mid way it said “there was a problem resetting your pc restart your device and try again, no changes made” after I restarted the pc and when it restarted it started booting up on a blank/grey screenI tried all the methods from YouTube and even previous ones from this website. Nothing worked but I still tried to restart my computer and after like 30 tries I finally saw my cursor after I saw my cursor I tried it again and then it showed a small box that’s white with a bunch of black dot

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