This one may be obvious but I thought I'd share it:

By default, Windows uploads analytical data of your machine to Microsoft via the Telemetry processes. These are quite the unnecessary and annoying resource hogs.

Well, you can turn that off by searching for Task Scheduler, looking for the Microsoft Compatibility Telemetry tasks and disabling them. Some of them are called Application Experience and Compatibility. I'm sure you'll find it.

As a side note, you can reschedule all of those tasks as you see fit. Some of them are useful and necessary but some aren't, causing bloat. For the useful ones, you can reschedule them once a month or something and not every day.

Pragmatism advised.