Has Stopped Working

Yesterday when I tried to run my AVS Converter a window pops up and says my converter has stopped working. Now I can’t use it anymore.
Today I tried to run my Magic DVD Copier and yes a window pops up say my dvd copier has stopped working. Now it won’t run anymore.
Tried to uninstall both and reinstall but still the same problem.
What is going on.Could it be Vista?