Ive been having lots of troule recently with movie files (various) when watching them on my PC.

They appear very bright in contrast to normal videos so much that its sometimes difficult to view...
Some files are fine but it has been about 90% recently which go this strange white brightness.
I have tried multiple players and have the newest version of the players...so what am I missing. Unless its a windows thing but im update don that too.
oh Dear ???
Anthony