I downloaded Android Studio and attempted to launch the program.
This is running on Windows 7 64-bit with Java 1.7. During the installation my Java 1.7 is detected,
Adding a system variable JDK_HOME with value c:\Program Files\Java\jdk1.7.0_21\ worked for me. The latest Java release can be downloaded here.
JDK_HOME
c:\Program Files\Java\jdk1.7.0_21\
Additionally, make sure the variable JAVA_HOME is also set with the above location.
JAVA_HOME