PA? - On further scrutiny of your clips in Project Media window ALL your files - allegedly WM9 files, have an extension of some spurious set of numbers within SQUARE brackets? What's all that about?

For example you have something like:

[133-t raws] Toukyou_Majn_Gakuken . . . . . (640x360_WMV9) . [F440 . . . ]

Meaning, that your EXTENSION is truly very odd indeed!!! You might wanna copying just ONE of those files and renaming with something that I or you might recognize? Try renaming file to:

My_test_Windows9_File .WMP

Let's try that? Yeah? But do it to a copy!!!

I have absolutely no idea just why you have brackets and numbers as an extension? No wonder Vegas is having a fit!

Grazie