05-06-2014, 04:25 PM
If during installation of an Android app, you get an error saying for security reasons, you're not allowed to install apps from unknown sources or apps not distributed via Playstore .... or something like that then all you need do is adjust your installation settings. To do this:
* Go to "Settings"
* Select "Security"
* Look for something like "Allow installation of apps from unknown sources"
* Enable / tick it
* Go back and try installing the app again