You ever get those pesky pop-up windows after visiting a site you’ve never been to?  You might now have malware on your computer.  Here’s a free malware tool called Malwarebytes.  You do download an app and it also asks you if you want to do the ‘trial’.  That’s up to you.  Only difference between the paid version and free version is that the paid version is real-time malware protection.

https://www.malwarebytes.org/dl-confirm/