Using Windows XP on my HP Pavillion, trying to open an email (OE) attachment with a .wmv extension. I get the error message: "This file does not have a program associated with it for performing this action. Create an association in the Folder Options control power". I've googled and tried a few things but so far no success. SO, time for TECH super SUPPORT GUYs!
I have many times been able to open these media film clips but recently I get this error message. What's happening?

Thanks for any advice to help me resolve this aggravation.