I have recently been noticing a current problem when using my laptop, which is that sometimes while browsing the internet I'll get an 'internet security warning'. I looked it up, and apparently it's a common type of malware. I'm not sure how I got it, but it's been frequently appearing and I'm not sure how to remove it.
I've done multiple full-scans and quick-scans with mcafee, but it never detects any viruses. What should I do?