Repetitive Blue screen after using verifier

[Windows 11]

After fiddling around with verifier as i was told i needed to disable it as it kept interfering with battle engine for Fortnite, I watched a youtube video which was made for windows 7 and im on windows 11 i did what it said and now im getting alot of blue screens repetedly i ticked all kf the boxes except deadlock detection and now i cant open google chrome and i dont have any volume to my computer and more.., now i do not know how to fix, someone help please

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