I have been using WLM 2012 under WIndows 10 for several months without a problem.  However, the other day it wouldn't start - after five minutes of disc spinning it told me to check my disk space (tons) and memory (ditto).  I tried uninstalling WLM and reinstalling - same problem.  I then uninstalled all of Windows Essentials and reinstalled - success!  But then, the very next day, same problem.  I am confident that nothing was updated or installed between the time that everything was working normally and the beginning of the problem.