[gigel82]

The first thing you do with a laptop (or any pre-built PC for that matter) is wipe it clean and install a fresh OS.

The most likely culprit for the slow-downs is OEM crap pushed on the device, not Windows itself.

In my personal experience (I'm running 6 Windows PCs in the house for the family and myself) I never had any issue with Windows 10 becoming slower or updates getting in the way or any ads for that matter (except when they switched to the new Edge where a notification of sorts showed up once after boot and was easily dismissed).

For full disclosure, I am running PiHole on my network so it's possible that's somehow blocking some ad-related activity (though I'm yet to see any evidence of actual advertisement being shown in the OS except for stuff about integrated software like Edge and now Teams - hoping this doesn't change with Windows 11). I'm also running fairly powerful machines (nothing older than 4 years, even the kids have beefier laptops), so don't have experience with old / slow machines.