I need some help - I was surfing on Safari when a popup appears demanding payment for a supposed legal infraction. It's clearly malware of some sort, but I can't close it and return to normal usage. If I click "OK" (the only option) I get a second popup looking for the payment, and it goes into a loop between popups. This renders Safari useless. I've tried to close Safari by swiping up from the bottom row after I double-click the main button, but when I reopen it's still there. I've turned off my iPad altogether and when I turned back on it's still there. I know I can't uninstall core apps, so what can I do? Do I have to go to complete restore to factory settings?