Attendance might need upgrading:
mod_attendance,2.3,2.4,2.5,2.6,2.7,2.8,2.9,3.0,3.10,3.1,3.11,3.2,3.3,3.4,3.5,3.6,3.7,3.8,3.9
https://moodle.org/plugins/download.php/25012/mod_attendance_moodle311_2021082600.zip
Manual upgrading of a plugin ... see:
https://docs.moodle.org/311/en/Installing_plugins#Installing_manually_at_the_server
Go to:
/admin/modules.php
If there is a number in Activities for Attendance, you are using.
Go to:
/admin/plugins.php
You'll find an 'uninstall' link.
Again ... am not a Windows person.
'SoS', Ken