Windows 10: PC lags really bad/freezes whenever full screening videos.

The problem started ever since I connected my laptop as a wireless display for the first time. Either video files or online videos whenever I Fullscreen them they lag really bad basically freeze until I manage to exit Fullscreen.I don't use the laptop as a wireless display after that first time. Full screening videos works fine on my other monitor when I plug it in but still not on the main monitor. The problem doesn't happen if I set the resolution to something else default is 1920x1080.So probably something to do with the resolution maybe. I used the laptop in portrait and landscape when

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the lagging is really bad

I really like to play video game every time I try a big video it's just lagging for example I tried to play fornite as soon as I opened it was lagging so bad and if that ain't worst the computer closed the game by it self, like I really wanna know what
is going on and hat also happens to almost every I tried that have a memory above five GB, even little Roblox have some major lags ,what is going on I expected a better performance from this computer

 

Video lag/stutter, suggetions?

Hey guys,

So ill start with saying I'm not very tech savvy, so sorry if any of this seems simple or stupid. I have windows 10 installed on my pc, its a simple Asus. My settings tell me I have an x64 based processor, a 64bit operating system, and 4gb RAM. Whenever I attempt to play a video file there is really bad stutter and lag in the video. Its more so with files already saved but will happen when streaming videos sometimes as well. Any suggestions on what to do about this?

 

Lag on videos

So i recently did the recent update for my pc and every video i watch, whether it's on youtube, hulu, or watching a live stream the video lags BAD. It never did that before the update and i ask support for help and they really didn't do anything at all.
Any tips or advice on what to do please.