Annoyer is a trojan on Microsoft Win9x.
When the file is executed, it plays a sound byte that seems to say "Shut up". After the sound finishes playing, the system shuts down. The trojan has also managed to add itself to run on startup by adding itself to the registry. Whenever the desktop loads, the trojan runs, and plays the same sound byte, and then shut down the computer after it is done, very similar to Duksten.
To remove the virus, the computer should be booted to Safe Mode and then delete the files and registry entries it had created.