Take a look at a Windows system after boot, even on a clean install. SO MANY little threads running doing stupid little things, all periodically waking everything up. The system indexer has to be one of the worse culprits (you can’t just scan on change?), but then there’s a low priority task that just continually scans everything looking for corrupt system files just in case. If you disable enough of these services, things get much better, but you run the risk of something else built on the mountain of cruft breaking.
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