how do i fix a black out screen and a disappearing taskbar?

[Microsoft Windows]

My laptop is microsoft surface and it has been bugging where my screen kept going all black and come back again then my taskbar keep disappearing too. when i try to go into the setting it would just lag me out of the setting ,i tried turning it off and on including restarting i read some stuff online about this and it saying its because of the new update to window 11 but am not sure and my laptop been very slow since this happen its acting as if its loading but there nothing to load for though.i don’t like how it kept blacking out on the screen and i really need this to be fix because i need i

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