Do not download any software as they tell you. That software could be a malware itself. Malware could do a various bad thing. Ad pop up is the lightest. It could keep scanning and keep asking you to pay for an annual fee for such software. That slows down your computer/ipad to death.. Anyway, your best bet is to download an software called Malwarebytes. They have both PC/Mac versions, free, a very good program.
Depends on which 軟件, if the software you've been using, that is fine. If not, if could be a malware or at least an adware. That could be clean with Malwarebytes, a very highly rated anti-malware program.