[Guide] How to fix the error com.android.systemui process has stopped

This is an annoying alert that appears on Android smartphones (like Samsung Galaxy S3, S4, S5, S6, S7, LG G3, G4, G5, Xiaomi Redmi, Mi, Note, Sony Xperia and many others), here you can find some ways to permanently delete this popup that appears on your phone. Let's see how:

Go to > this < link on the "Google" and click "Uninstall". Later to avoid this repeated problem, always on the Play Store, go to Settings -> Automatic update of the app and update applications automatically deselect.

If this does not work enter the recovery mode by pressing for 5 second or more, when the phone is off, the (Volume Up) + (Home) + (Power). (If your phone does not have the physical Home button, we will keep the high volume + Power). Scroll with the volume keys up to Wipe Cache partition and then press the power button to select it. Done that, to turn  on the phone go to "reboot system now"

If the first method does not work, always on the recovery mode, select Wipe data / factory reset. Beware though this method will erase the data, better make a backup first!