Mypc-windows-security.info is a malicious domain which is the example of online scam. Users see these pop-ups in their browsers and do now know what they’re all about. However, the answer to this question is quite simple. These pop-ups are the result of adware to be enabled and running in your computer at this moment.
Pcoptimizer247.com pop-ups are caused by adware currently enabled in your workstation. These pop-ups only intend to make you scared about the condition of your computer and to force you into wasting your money. So, you should stay away from interacting with these pcoptimizer247.com scary alerts.
Optimizemypc.info pop-ups are caused by adware currently enabled in your workstation. The problem is that it might be difficult for you to identify this particular adware in your computer. It may not be mentioned directly in the list of installed software. Neither will you find any suspicious extensions in your browser. Still, there might be some hidden processes running in the background and causing such multiple pop-up issues.