Usually when installing Flash Player, I can uncheck the boxes to ensure I don't get that junk installed, but when installing the latest update today, it installed it without requesting permission or even informing me of it, I didn't agree to McAfee, so why was it forced upon me?
There's an update link that installs it with no opt out. It's been reported months ago. It has also been suggested that Adblockers will hide the "opt out" on the download page as an ad, but I tested this morning and it made no difference if I disabled AdBlock or not.
You can download the Adobe Flash Player installers directly by right clicking one (or both) of the following links.
I use those to avoid any bundled software.