I've been reasonably happy with a laptop I've had running Windows 7. Then it stealth-updated itself to Windows 10. I turned off most of the ads, but the lock screen still had ads. I had to turn of some service with an incongruous name to kill those but Cortana still shows up on the lock screen telling me to talk to it. Like I'm going to do that?

Also, the start menu is all fubared. I end up using search from the start menu, which works but is really slow. I'll get the search box and type something into it and it's 30 seconds to a minute before my text shows up there, usually missing the first 2-3 characters I typed... but not always.

Microsoft needs to have a good hard look at why they had so much trouble moving people off of XP. It's like they hit an inflection point there with the least amount of suckage.

You notice it on the lock screen, but it's mostly just partial factoids about a particular picture that takes you to bing if you click on it (after the lock screen.) I turned off the ad for their cloud service before I saw it, but Apple's pretty insistent on that themselves. I've also turned off Cortana's voice and other things I've found, and I'm considering moving back to Linux, but it's just not intrusive enough. I'm being tracked by everyone else - what's one more? :/

To be honest, I haven't noticed this. I think they're mostly onedrive ads anyway, and I have onedrive activated on most of my devices, so that could be the cause.