There are a few steps you can take to reduce the chance of seeing pop-up ads on your computer:

1. Install an ad or pop-up blocker to help reduce the number of annoying advertisements appearing.
2. Keep your web browser and antivirus software up to date. This will help protect against malicious or negligent ad creators, as well as keep malicious software away.
3. Be careful when you click on things on the Internet. Pop-up ads may be disguised as something else, so it’s important to be alert and not click on anything you aren’t sure about.
4. Be wary of advertisements you see on the Internet. If it’s too good to be true, it likely is.