I have been using Movie Maker for two years, no problems.  I import videos all the time, work on them in wlmp format and then typically save as WMV for later uploads or burn to DVD.  For unknown reason, was working on wlmp file, was copying trimmed cuts from another wlmp and pasting them into a seperate project (creating sports highlight project).  I've done this on dozen or more occasions.  Suddenly after copying selected clips and attempt to paste them in new project, WMM freezes and at the bottom of the project is shows "Loading Audio Data".  I've been searching and found this to be common problem.  May be a codecs issue, but I can't resolve it.  

I've already tried the CODECS Fix It trouble shooter.  I've uninstalled and reinstalled MOVIE Maker 2012.  

Not sure what else to do.