The 'Joke.WinError' is a joke program. Being run it installs
itself to system. It copies itself as WINERROR.EXE to \WINDOWS
directory and sets system and hidden attributes to its file. Then
it adds its execution to WIN.INI file after 'LOAD=' string.
When Windows boots up the joke program is loaded and stays
resident. From time to time it generates Windows low-level error
messages (big white windows) like 'Keyboard not connected' and so
[Analysis: Alexey Podrezov, F-Secure]