Adware:Adware (or spyware) is a small program that is designed to show advertisements (in various form and degrees of intrusiveness) on your computer. It often reports personal information back to its owners. As a result your sense of privacy can be violated.
YazzleSudoku is an adware program that is known to install itself on your computer without consent. YazzleSudoku is often force-installed on your computer through numerous browser security flaws, and will display a barrage of advertising on your screen. YazzleSudoku is an ad-supported Sudoku puzzle game.
Technical details (How to remove YazzleSudoku(pop up))