The first thing we recommend you do is verify your cursor settings from the system settings. If you choose a default setting, the game automatically runs the mouse sensitivity setting from Windows default settings. And when you reset it, you will have to set the speed back to where you had it.
To do this you will have to go to Start> type "Mouse"> access Additional Mouse Options> select Pointer Options> simply set the speed where you want or require.
Another correction consists in modifying the sensitivity of the league a from the game options.
For this you will have to press the ESC key to access the options menu> or click on the gear icon in the upper right corner of the screen> select Game and set the mouse speed as required.
Another option is to copy the file "PersistedSettings.json" to another folder and paste it back to its destination to reapply your settings and test if the problem is corrected.
That's all you have to know about how to fix the League of Legends mouse cursor speed issue, we hope our guide has been very useful, and you can correct the problem as soon as possible. Remember that if some method does not correct it, go to the next one until you find the correct one.
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