Just to make sure, I’ll post my variables so you can compare them. Extracted all components to c:\android folder without renaming, java default install.
ANDROID_HOME C:\Android\adt-bundle-windows-x86_64-20131030\sdk
ANT_HOME C:\Android\apache-ant-1.9.3
ANDROID_NDK_ROOT C:\Android\android-ndk-r9c
JAVA_HOME C:\Program Files\Java\jdk1.7.0_51