Considering that what most Windows crapware installers do is mercilessly track users for the purposes of marketing and that Google's main business is tracking users mercilessly for the purpose of marketing, it is hard to see how this is some random event.
Google's definition of "best search results" is related to their bottom line, and the goal is to be as intrusive as possible without driving searches away. This is why the Google ad network laden "weather.com" is returned before the ad free and purely scientific "weather.gov" from a US search for "weather."
For real fun, search for "pdf to html" and "pdf to html linux" to compare the degree to which Google promotes solutions that collect data on users. A Windows user would never know that a free quick private and powerful alternative is just one VM away.