There are at least two other workarounds for the Windows Meta File (WMF) exploit that I’ve been looking into this afternoon. These from sunbelt blog.
First up…
2. Change file associations for WMF files.
An equally ugly fix (but perhaps preferable) is to do the following:
1. Go to My documents, Tools, Folder Options, File Types.
2. Change WMF Image to notepad and select always open with this.
Your WMF files will open in Notepad. Ugly, but it is a fix.