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What Does DoSvc Do?

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I’ve noticed that Windows\Logs\dosvc\ fills up with .etl files
over time. Each file is 64 kB. Not huge. I have deleted them
before, so there are not very many of them, but another website
reports this folder taking up more than half of a 160 GB drive.
This is obviously a bug in Windows 10, and may have already
been fixed in an update, maybe even an update that is included
in my newish laptop’s OS installation. I’ve just noticed that the
folder contains kind of a lot of files, and I suspect that they
aren’t actually being used for anything.

The other website says the service Delivery Optimization, DoSvc,
can be disabled, and the files will no longer be created. It doesn’t
say one word about other consequences of disabling the service.
Black Viper leaves it as Automatic (Delayed Start). The description
of the service is “Performs content delivery optimization tasks”.
Does anyone know what that means? What content? Delivered
how? Optimized in what way?

— Jeff, in Minneapolis