They're not quicktime files. Media player Classic and windows media player are different programs too. Also, as I said I've tried 4 differnt programs...I doubt they are all out of date??? I tried the view thing,a nd it says type "media player classic" it doesn't say an extention???

I'll try updating it..it's just weird it lets me play SOME files, and won't let me play others...I'm sure it's the same extention...

It says this if I click on details
" this error report includes: information regarding the condition of Media Player Classic when the problem occured the operating system version and computer hardware in use; your digital product ID, which could be used to identify your licence and the IP address of your computer"