Open bash or windows commander (cmd) and run following command:
```
java -version
```
Output:

Checking java version with Windows Commander
It is possible to check existance of JDK directory:
```
C:\Program Files\Java\jdk...
```
Screenshot:

Default JRE and JDK location on Microsoft Windows
If JRE or JDK is installed the path of java should be added to environment variables.
Screenshot:

Java path in Environment Variables.

2. Download Apache Maven

Go to official Apache Maven webpage: http://maven.apache.org
Go to Download subpage (or use direct link: http://maven.apache.org/download.cgi)
Download Binary zip archive or Binary tar.gz archive
Screenshot:

List of Apache Maven files to download.

3. Extract Apache Mavent archive (description for newbies)

Use right click on archive file and extract it with your favourite program:
- 7-Zip
- WinZip
- WinRar

After extracting "apache-maven-3.6.2" directory should appear (3.6.2 is depended of downloaded version in previous step).
Move "apache-maven-3.6.2" to "C:\Program Files\" directory.

Note: extract operation has been splitted to steps because of necessary administrator permissions for move directory operation.

Open with right button context menu for This PC (previously My Computer).
Open Properties.
Screenshot:

This PC -> Properties
Open Advanced system settings.
Click Environment Variables... button.
Click New... button for System variables.
Create M2_HOME variable with value "C:\Program Files\apache-maven-3.6.2".
Screenshot:

Adding M2_HOME variable to environment variables on Windows 10.
Add value "C:\Program Files\apache-maven-3.6.2\bin" path to Path variable for System variables - do not forget to append "\bin" at the end of path.
Screenshot:

Adding Apache Maven path to environment variables on Windows 10.

Open Windows Commander (press windows key + r key, type cmd and press enter key).
Bash for Windows can be used too (install and run instrucion here).
Screenshot:

Run window with cmd program name.
Test Apache Maven with following way:

mvn -v

Output: