hello greywizard and sorry !
the new mpcstar 4.0 & 4.1, has a problem with its codacs that is used in the program . it conflicks with windows dvd maker and windows movie maker , it seems that window,s movie maker works with w,dvd maker for some reason. when you go to wins movie maker then TOOLS , OPTIONS, COMPATIBILITY you will see all available filter,s if you untick the box,s of mpcstar each one in turn you will find which one is the culprit.!