Today, a site called "The Real Strategy", which tends to feature more supermarket-tabloid like stories sometimes, and which offers pop-ups, had a story on putative life on Europa, a moon of Jupiter. The story, about the subsurface ocean, is valid and is backed up by many more mainstream news sites. The site is marked "green" by Trend-Micro. When you try to read the entire story, you get interrupted by a bloatware site saying your browser software is out of date and offering a download. You could not read the article without the download.
Of course, I canceled. The Chrome history shows only a loading of "ay.gy" and offering the viewer to get paid for unpacking tiny url's.
I restarted the Windows 10 Anniversary-update computer and Trend Micro found no problems with quick scan. I did not download anything, but Real Strategy did link to the "ay.gy" site without the user permission. ay,gy converts to adf.ly, a "URL shortener that pays you".
Users should not download advertised "free" software for computer speed-up, etc., without checking the vendor separately. It is true, there are some registry cleanup products from reputable companies. Normally, users should stick to manufacturer, operating system provider, major browser, and major application software downloads from well-known and reputable companies which users can check out first. Users should not download "free" software on impulse. Some of this bloatware also comes on some YouTube ads.