Video and sound not working
I have found several issues with Itunes on various computers where when playing trailers in Itunes, there is NO video and NO sound. All of the affected machines are on Windows 7 Professional mostly 64 bit. Some Dell Desktops and some Lenovo laptops. There seems to not be any pattern. Uninstalling Itunes and re-installing does not fix this issue. Some machines with same above OS have no issues. All are on iTunes 11.1.3.8 version. I have searched through many formums and it appears this issue has been occuring for many many years. I see forum's back to 2008. There seems to be no really resolution to this issue. Anyone else having these problems and or what other things have you done to resolve this?
Thanks
iTunes-OTHER, Windows 7