Pop-up windows from hh2m.com domain are the result of some disgusting adware to be the part of your computer. You may see that these pop-ups always intend to make you call some toll free numbers. You could also think that these alerts are legitimate, but their only aim so far is to get your money by forcing you to make payments in favor of cyber frauds who distribute them.
Pi4g.com pop-ups have been attacking many computers primarily in the United States of America recently. These are fake security alerts with the only intention of obtaining money from unwary and scared users. People who have invented these pi4g.com pop-ups do not really care about helping your PC to become clean. They only want you to become their victim. So, obviously, this is a must-do thing for you to remove such pop-ups. But the problem is that it is quite difficult to find their source.