Alertuser-win.com-err-ddiekd.site pop-ups are a new scam currently circulating in the world wide web. The purpose of all these alerts is to make you scared about the condition of your computer. It is true that your PC is infected with adware and possibly with some other potentially unwanted programs. However, these alertuser-win.com-err-ddiekd.site pop-ups are simply the part of this adware. They’re not genuine notifications from Microsoft.