A small but vocal minority of people that congregate here profess that they believe the entirety of Windows 10 to be adware since it comes with a few third party app icons pre-installed on their Start menu. They always name the same one, Candy Crush, because they think it's some lame game that nobody actually wants. They will also complain about error reporting that can't be turned off because they think that Microsoft cares about gathering their personal information and not just improving their products.

Meanwhile, Candy Crush has almost 3 billion downloads across all platforms. It's a very, very popular game. You can also remove these apps and for the most part...and they never come back. Some users will recount tales of how they uninstalled something and how after an update, it came back... but this is not a very common tale; perhaps something that happened in early releases. I've never seen it happen. Microsoft also doesn't make money on advertising in Windows 10, their advertising income is mainly from Xbox and Bing.

Many if not most of these same people, in my estimation, will happily use apps which have telemetry that can't be turned off on iOS, Android or even on their favorite desktop OS. Apps such as Slack or Spotify. They will use web sites and apps that use logging and error collection APIs like Sentry without a second thought, yet they decry Microsoft for doing the same.

Note: I don't use Windows for work anymore. I've moved to Linux. But that's due to the nature of my work and not any sort of beef with Microsoft. Although I wish they'd do some things better, I think that Microsoft generally makes very high quality software and they have always listened to users as far back as I can see (to Windows 3.11)

It is a well known fact, so if I think you should elaborate what Windows version you use, what country etc.

Though I am expecting you are throwing a bait and when someone gives an example you will respond that that obvious advertising is not ads