Virus checkers are wonderful tools-— when they work. The problem is that you never know if they are telling the truth or not when they claim to have detected a virus on a web site or in a file on your computer.
The problem is called “false positives.” This happens when a virus checking program says there is a virus or there is a POSSIBILITY of a virus when, in fact, there is no virus in the web site or in the file. Sadly, this happens thousands of times every day, mostly to Windows users.
My favorite reference for this issue is How To Tell If a Virus Is Actually a False Positive, an article written by Chris Hoffman four years ago that still seems to be very accurate. He wrote:
“Your antivirus will complain that this download is a virus, but don’t worry — it’s a false positive.” You’ll occasionally see this assurance when downloading a file, but how can you tell for sure whether the download is actually safe?
A false positive is a mistake that happens occasionally — the antivirus thinks a download is harmful when it’s actually safe. But malicious people may try to trick you into downloading malware with this assurance.
The article may be found at https://www.howtogeek.com/180162/how-to-tell-if-a-virus-is-actually-a-false-positive/.