How to change Android x86 screen resolution

At Android x86 boot menu entry(the first item in the following image), press E

Android x86 install apk via USB flash drive

Assuming the apk is in the root directory of USB flash drive and named test.apk

Connect USB flash drive. Press left Alt and F1 to go to console, then run ls /mnt/media_rw to list all probable locations of USB disk, you need to test it yourself to find out what location is for your USB disk, mine is usb0, and run ls /mnt/media_rw/usb0 to make sure if the content is your USB disk.

How to backup apk of installed apps to USB flash drive for Android x86

Press left Alt and F1 to go to console, then run ls /data/app to list apk of installed apps including apk of updated system apps. For example, this is my result after running ls /data/app:

How to remove apps from the list of My Android apps

Go to play.google.com/apps you'll see the apps you ever installed including the apps that have been removed. If you don't wanna show the apps that have been removed, only you can do is using Play Store to delete the record of apps that have been removed.

Open Play Store, click the Play Store button at top left.

How to use Windows to install apps to Android x86

First off, you must have downloaded at least one app from Play Store in your Android device.

Steps:
in browser in Windows and in Android device must use same Google account to login.
in browser in Windows, go to play.google.com to install app.
then you'll see app is downloading in your Android device, app will be automatically installed after downloading.

If your Android device is power off, app will be automatically downloaded and installed after you turn on Android device and connect to Internet.

If you can't install Android apps by browser, you can install apps by Play Store

After reinstalling Android x86, some apps can't be installed by visit play.google.com in browser, there's a button with the text Installed and green background, after click that button I can't install app.

In this situation I gotta give up installing apps via browser, but use the built-in Play Store to install apps. In the built-in Play Store you click search button at top right to search for applications you ever installed.

How to prevent Android x86 screen from automatically rotating and lock screen rotation

Some software will rotate screen, use the application introduced in this article, you can prevent screen from rotating.

Go to play.google.com and search eflow, find and install Screen Orientation (This app only 43KB)

How to prevent Android x86 from turn off display

At the lock screen before entering desktop, screen will turn off and become a black screen in a few seconds, it's unable to prevent this screen from turn off.