Hello I'm using 8.1 and after a fresh install the first app I install is UAPP and it works for about a week and finally it launches with a gray screen and doesn't load. But just before that I get a message saying that Android has stopped working. I would see this if I have Chrome installed there's a big problem with Chrome and Android-x86 and it's affecting paid apps. Try it for yourself delete Chrome you can find it at /system/app/chrome just delete the folder. You'll notice your system run without the Android has stopped error I now use Firefox and I'm about to check out Microsoft Edge. UAPP hasn't failed me yet I'm on 2 months with this installation and no errors.