Whenever I use my licensed version of Regvac it hangs after a routine Microsoft Windows Home edition update of some months back.  Then I have to kill regvac with the Windows Task Manager (ctrl-alt-delete).  What to do to fix this?  TKX.  

   First, I would suggest that you wait an hour and see if RegVac is actually hanging or just busy working.  When RegVac is busy working, Windows will report it as not responding.