F53777e67n.top malicious pop-up distracts the attention of many computer users, primarily in the United Kingdom. It is possible that PCs in other countries will be attacked as well. These pop-ups represent serious online scam which has the intention to steal money from unwary users. They do not realize that these pop-ups are not legitimate Windows notifications. They do not understand that there’s a serious virus in their PCs which causes such pop-ups to appear.