We are trying to put together the next release of Mahout but need a volunteer who uses is on Windows. The Script used to launch Hadoop Mapreduce jobs and Spark jobs need to be undated for the latest Windows and to include new CLI bits that run on Spark. The issues is about updating mahout.cmd launcher script.
If you can help check out this Jira https://issues.apache.org/jira/browse/MAHOUT-1589 <https://issues.apache.org/jira/browse/MAHOUT-1589> Thanks Apache Mahout