@Fiat_Lux - try running calibre with the --ignore-plugins switch, see ==>>
Command Line Interface
If that improves shut down times disable any "Library Closed Plugins".
Those start/stop times are atrocious, what sort of computer - a DEC Rainbow PC with a couple of DECTapes for mass storage?
Added:
Quote:
Originally Posted by Fiat_Lux
Reboot the system (Windows)/run "kill -9 ####" (Linux)
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That makes me wonder if you're using some sort of VM environment - what happens if you run calibre in native Windows or Linux.
BR