after my latest reboot about half of the movies i try to play on my pc are played upside down this has never happened before whats happening what can i do??

Hi skeen87.
9 times out of 10 it's a codec issue or a conflicting DirectShow filter.
Need a little more info to go on though.
What do you use for video playback (i.e wmp,etc) and does it do it with all video extension types (i.e .avi, .wmv, etc)?