WMF is short for Windows Metafile. This image format was designed by Microsoft in the 1990s for their Windows Operating System. WMF files contain both vector graphics and raster components at the same time. It includes sort of programming commands which enables the creation of lines, circles, and rectangles on the viewing applications. This 16-bit image format is portable between applications. Also, WMF is the native vector format of Microsoft Office applications (MS Word, MS PowerPoint and MS Publisher). This format is also supported in PaintShop Pro.
I kept getting the blue screen with Driver Power State Failure error message and then my computer would restart. I found your product and it did not happen any more. I just purchased an anti-virus (kaspersky) and now it is doing it again. It is so frustrating. My computer is only 6 months old. It is a Asus desktop.