Disable Cisco Webex or Microsoft Teams

Windows:
Hold Ctrl+Shift+Esc to go into your 'Task Manager'
Click 'Startup Apps (along the left)
Find 'Webex' or 'Microsoft Teams'
If either are Enabled, right-click on the word 'Enabled'
Select 'Disable'
Close the window
Make sure 'Webex' or 'Teams' are not currently open on your laptop/computer. If so, close it.

MAC:
Top-right, open 'Search' (hourglass)
Type 'Webex Meetings'
Open
Top-left, click 'Cisco Webex Meetings'
Choose 'Preferences'
Choose 'General'
Uncheck 'Start Cisco Webex Meetings when my computer starts"
Top-left, click 'Cisco Webex Meetings' again
Click 'Quit'