Ch4a.com is a malicious domain causing many unwanted pop-up windows to appear in your browser. These pop-ups pursue the goal to make you scared about the condition of your computer in order to convince you to pay money in favor of cyber crooks supposedly to fix it. These frauds will be presented in ch4a.com pop-ups as some Microsoft Certified Technicians. For example, you may see people named Gregg Foster, Molly Jefferson allegedly chatting with you. They will also speak of themselves as members of some PC Support – Microsoft Pinpoint Network. The truth though is that they’re the bunch of liars and criminals who hunt for your money.