Go to Options (on the top right corner) > Remote Control > Quality > Optimize speed. You can also change the display quality to an optimized speed. Therefore, you’re recommended to change the screen to a smaller size but not too small and hide the wallpaper. Higher resolution and wallpaper mean greater details, and that details take longer to be sent over the Internet. Screen resolution and wallpaper both play big parts in performance. In order to improve the speed of your remote connection, you can change the settings beforehand in your TeamViewer options. Next, we’ll introduce how to fix TeamViewer very slow from three perspectives: TeamViewer settings, Windows settings, and Internet settings. While a fast Internet connection on both sides counts to a large extent, you can apply a number of Windows and software optimizations to get the most out of the problem if you’re experiencing lag and pauses when using TeamViewer.

Why is TeamViewer so laggy? The performance of TeamViewer depends on three settings: Internet settings, Windows settings, and TeamViewer settings. Opening a file or getting a response from the remote computer takes five minutes.” I can move the mouse on my partner's computer when we are connected, but it takes a very long time for an application or folder to respond when I click on it.

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