It is said that a picture is worth 1000 words.
I don’t know if two pictures are worth 2000 words, but I think they speak for themselves.
If a website requires some “helper software” or it reports an error and offers you to install something (a code, a viewer, etc.) to solve the issue, then don’t install it.
If you really think you need it, go to the source/author of the software required and install it from there. Never install something offered on a website that has nothing to do with the respective software.All these and many more topics are in the free eBook "Improve your security" available here: www.improve-your-security.org.