D064uud.dll is a component of the Canon Incorporated. It is part of the ScanGear CS-U version 6.0.0 programs to be specific. It is a registry error, and you may be tempted to go online and look for the missing or corrupted file and simply replace it. I must warn you this would be a big mistake since this would involve going into your registry.
The registry is a complex system of interrelated files and fixing one file is likely to screw up another file. Even the most knowledgeable computer expert would not mess with a computer’s registry by hand. Instead, computer experts rely on registry cleaners to fix registry errors.
Therefore, what you need to do is run ZookaWare PC Cleaner which is a reliable registry cleaner and a member of the Better Business Bureau. It is backed by a unique satisfaction guarantee.