I don't use the content server, ducks. I manually run Calibre when I want to use it, which is generally no more than once or twice a week (which is why I say that this isn't a significant issue). The same delay happens if I start Calibre 5 minutes after booting my PC or 5 hours after boot, but it ONLY happens the first time I start Calibre. I can subsequently exit it and it'll re-launch in a couple of seconds.
I don't think it's a hardware issue. No problems with any other program, and nothing suspicious in the Windows event log.
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