Correct Answer. B. Verify the identity of the user and ensure they have the correct link and meeting credentials Before starting a support session, verifying the user's identity and ensuring they have the correct meeting credentials protects against unauthorized access and ensures that both parties are prepared for the session.
Option A is incorrect as sharing the entire desktop should only be done when necessary and with proper precautions.
Option C is incorrect because the technician should guide the user through any software installation or updates to avoid errors.
Option D is incorrect as disabling the firewall may compromise the user's network security and should not be recommended without thorough consideration.