Know about newsafe-system.org pop-up
The page of Newsafe-system.org is recommending a media player with the title of "Media Player Update Recommended" and the detail functions of this player. However it is actually a fake download recommendation. The file you get from this page is the installer of malware, which can only mess up your system.
The adware in your PC send such messages to mislead users to download the file, in order to earn pay-per-installed revenue. To achieve this goal, the pop-up can come as soon as you run the infected browsers including IE, Chrome and Firefox. You can also find some other symptoms such as browser hijacking, redirects during the browsing and sluggish computer performance.
The adware can be brought by freeware or shareware bundling. You probably have no idea about how and when did the adware come, and it will not stop sending such misleading messages until you take actions to remove it completely.