The Guide shows you Step-by-Step How to Install and Getting-Started with the Latest Apache Maven 3 Release for Windows 7.
As Prerequisite there is Java so Inside the Post you will find a Link to Post on Installing the Latest Oracle-Sun Java JDK 7 for Windows 7 32/64-bit.
And this Visual Guide includes the Basic Screenshots of All GUI Steps involved.
The Content give Focus Only to the Essentials Instructions and Commands to make it Easier to Follow.
Download Maven:
Unzip into:
C:Program FilesApache Software Foundationapache-maven-[x.y.z]
Example for Maven 3.0.4:
C:Program FilesApache Software Foundationapache-maven-3.0.4.
Open a Shell Window: 
Check if Java is Installed
java -version
If Not then Install Java:
Set-Up as Below Environment Variables and Path:
Guide to Set Windows 7 Path and Environment Variables:
User Variables:
JAVA_HOME = C:Program FilesJavajdk1.
M3_HOME = C:Program FilesApache Software Foundationapache-maven-[x.y.z]
M3 = %M3_HOME%bin
User Path:
Path = %M3%.
Test Maven Installation:
Open a New Command Line Window.
Try to Execute:
mvn --version