Problems playing video files on extended desktop

[Singsation]

I would like to no if this has been sorted, I am having the same problems since updating, it has happend before and I have wasted many hours and lots of money on updates, virus scans, hardware and raised many tickets on this. When hoster first was able to play video I had no problems and would see it in both the extended desk top and in preview window. After many hoster updates I know cannot play MPEG2 through hoster on a secong monitor (extended desktop). I can if I drop Windows media player to the sencond desktop. And on a ealier version of hoster using one of the insta buttons (now gone) so I have 2500 converted lazer karaoke I cannot play and another £40.00 lighter in the pocket. Progress