Sometimes we need and want some apps that are not part of the official Amazon Appstore but having their Fire TV stick prevents us from installing anything that's not in their store, or does it?

You can quickly "jailbreak" given stick and unlock additional installations via different providers. Although the term jailbreaking is associated with illegal and hacker activities rest assured that in this case there is nothing illegal about this procedure and that you are entirely safe.
Jailbreaking process
In order to do this procedure firstly you will have to allow the installation of apps obtained from outside the Amazon Appstore. To do this open the settings menu on your Fire TV Stick and inside settings choose My Fire TV. On the My Fire TV page select Developer Options and inside select Apps From Unknown Sources. The prompt screen will open, choose Turn On to activate the option.
APK installation is enabled now and the next step is to download an app like Downloader that will allow you to get your favorite apps. Downloader is free to download manager fully available on the Amazon Appstore and with it, you can download any kind of file to your device including APKs.
Once installed open the Downloader app and type in the URL or search term in order to find your application of choice but please do get all of your APK from trusted sources in order to avoid exploits and getting malware.


Once File Explorer is up and running right-click on the hard drive you wish to run disk cleanup on and click on properties.
Properties Windows will open on the general tab, on that tab you have disk cleanup on the lower right part of properties, click on it.
Wait for Windows to gather information about your hard drive and files on it. After it is finished you will be greeted with the next screen:
Here you can thick and mark which items you would like to get rid of and which ones you would like to keep. Note that you can freely tick all of them and remove them since removing these files will not break WIndows in any way. make your choices and click on ok. You can also click on Clean up system files to run system files cleaner and get rid of junk there, you will not be able to choose any options there, Windows will alone clean up what is not needed.
After disk cleanup is finished least thing you will have is more free disk space, but like mentioned, keeping your Windows and computer healthy goes a long way in its usability, speed, and performance. 