They are NOT "missing". They are parts of the file "VMM32.VXD" which Windows "builds" out of the individual *.vxd components. Since each computer is different, each computer's VMM32.VXD is different. Whether this "composite" VXD file is a good thing or not is a hotly debated topic. Many people claim to have increased their system stability after manually extracting each component of their VMM32.VXD, many more say there's no difference, and many more still say it decreased stability. I did it once, with no perceptible difference, but at the time I did not know what I was doing in general, so my machine was crashing all the time, regardless. Now, I <I>do</I> know what I am doing, and Windows never crashes, (certain apps do, once in a great while, but not Windows), and I have not done the "VXD trick", on my current installation.