I get a hundred of this error every day. In fact I got 2,112 (yes over 2 thousand) in the space of 21 days.
The description for Event ID ( 0 ) in Source ( FolderSize ) cannot be found. The local computer may not have the necessary registry information or message DLL files to display messages from a remote computer. You may be able to use the /AUXSOURCE= flag to retrieve this description; see Help and Support for details. The following information is part of the event: Cache reports error 0X00000001: Incorrect function.