2.Open the folder with the version number of Opera(something like 15.0.1147.153 or 16.0.x.x.x).
3.Delete or rename the file named opera_auto_update.exe.
4.Restart and it won't bother you again.
LiceCap - record the windows activities to a GIF animation. Screenshots are best things to show other people how to do something than explaining it for hours. But animation is a bit more useful to show the full activity step by step.
AIMP3 - I never thought a music player would this cool. Playlist is best for me. Light weight, customizable, contains tag editor, library. The theme I am using cln white found in deviantart.