Random windows keep popping up, and I don’t know how to remove them. Can you help?

If you use this antivirus, read next
Can McAfee Antivirus Trigger Pop-Ups https://gridinsoft.com/blogs/how-to-remove-mcafee-popups/ ?

McAfee is a reputable software provider that generally avoids intrusive pop-up practices. While the McAfee browser extension may display notifications, these are typically non-intrusive and geared towards user safety. However, if you’re seeing aggressive or fake McAfee pop-ups, they’re likely caused by other sources.