How do I manually reinstall a touchpad driver on a laptop? +optional question

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Phase Shift

My laptop model Dell Inspiron 5577 gaming and it has been giving me some trouble over the last few months following a half dozen Windows updates. My touchpad just suddenly disappeared from settings and is unusable, anytime I go to device manager and try to uninstall + restart it never fixes anything and stays listed with the yellow triangle on device manager (I assume it's the PS/2 Compatible Mouse driver since it's the only one with a yellow triangle under Mice and Pointers devices, but I'm not an expert) I was wondering and would appreciate if anyone had any information on how I could fix th

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