I was browsing a sketchy website that had a ridiculous amount of pop-ups. After becoming concerned, I realized that my antivirus (Avast) recently uninstalled itself. I downloaded Kaspersky Security Cloud and when I visited the website again, it kept blocking drive-by downloads.
However, when I ran a full scan to find the downloads that weren’t blocked when I visited the site unprotected, it didn’t detect any malware.
I also downloaded Malwarebytes but it only detected 4 files that were only classified as potentially unwanted.
Should I be concerned that my PC still has background malware that I can’t get rid of?