Kaspersky may be blocking the worker process folders used by the installed version of Calibre.
Competent PC users (think before they click
) will be just fine using Defender. Most of the Phishes coming my way by email have something wrong. (eg
my bank used the wrong mail account)
I
hover over links and look at the Status bar (or balloon), to see if it matches/makes sense for what it
should do (some are really sneaky
).