FULL PRODUCT VERSION :
Picked up _JAVA_OPTIONS: -Djava.net.preferIPv4Stack=true
java version "1.8.0_91"
Java(TM) SE Runtime Environment (build 1.8.0_91-b15)
Java HotSpot(TM) 64-Bit Server VM (build 25.91-b15, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Windows 7 Emterprise Service Pack 1

A DESCRIPTION OF THE PROBLEM :
How to reproduce:

Run the JDK installer for windows x64.
Set location
C:\programs\java\jdk1.8_91
(this location is actually asked twice, which is a bit weird)

Result:

C:\programs\java\jdk1.8_91 is actually the JRE installed instead of the JDK (no javac.exe for example, but a javacpl.exe instead)

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run the JDK installer for windows x64.
Set location
C:\programs\java\jdk1.8_91
(this location is actually asked twice, which is a bit weird)

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Installs the JDK
ACTUAL -
C:\programs\java\jdk1.8_91 is actually the JRE installed instead of the JDK (no javac.exe for example, but a javacpl.exe instead)

REPRODUCIBILITY :
This bug can be reproduced always.