Second Android app development guide available from Google:

Making a successful Android app requires a design that both makes the app good at what it does and appeal to device owners as well as skill. To help in that effort last year, Google published an online guide that shared tricks and tips to show developers the way to success.

That guide was downloaded over 200,000 times, and Google has released a second edition giving more advice to developers. The new guide adds features designed to help create apps that are better on the Google Play store.

The guide covers building beta testing procedures that are better, offering app invites to entice people to use the app, and the best way to conduct experiments in store listing methods to get apps noticed.

The English edition of the developer's guide may be downloaded from the website of the Tech Witty and on Google Play. It ought to be available in many languages.

The book is being augmented by Google with video episodes on its Android Developer YouTube channel. The first two episodes are available, and there are plans to release two new video episodes.

For some people, the most painful PC difficulties are self-inflicted. Ordinary mortals who do not have ten years of experience on the help desk or an engineering degree sometimes install even or unwanted malicious software, and the results can range from annoying to catastrophic.

One way to reduce those support calls is to lock down Windows 10 unless it comes from a trusted source, the Windows Store so users can not install new software. With the new capability for developers, the selection in the Store is much more powerful and larger than you may think.

(This option is new in Windows 10 version 1703, the Creators Update; you will not see it if you are running an older Windows 10 version.)

Go to Settings ">> Apps ">> Apps & Features and look for the Installing Apps setting on top of the page. You have three choices:

*Allow apps from anywhere - This allows you to install apps and is the default setting.

*Warn me before installing apps from outside the Store - With this option set, trying to run a standard installer for a Windows desktop program results in the message. As an administrator, you can override the setting, but any standard user accounts will need your permission.

*Allow apps from the Store - Use this option should you not want users to be able to install apps from anywhere except the Store.

Note that even with the restricted setting here, before enabling this restriction, any conventional desktop programs you install will continue to run. To set up a PC without your permission and after that lock it down, so nothing changes using a selection of trusted apps.