If you read your email message they wanted you to downgrade WMP to an older and ... exploitable version.
That's a bad thing.
As such it's time to delete this email.
I tried to open an email containing a video and a window came up with this message:
"The file wmp.dll has a version number of 10.0.0.3990 where 10.0.0.3802 was expected.
Windows Media Player is not installed properly and must be reinstalled.
Do you want to install the Player from the Microsoft Web site?
I clicked "Yes" & proceeded to download as per their instructions. I received a message that the download was successful, but when I tried to open the email, I got the same message. I attempted to download again, to no avail. I am using Windows XP
Any help would be greatly appreciated. granpama