The statement "Do not download or execute applications from trusted sources" is incorrect and not considered a good practice for maintaining information security and eradicating malware incidents. In contrast, downloading or executing applications from trusted sources is a fundamental security best practice. Trusted sources are vetted and are generally considered safe for downloading software, updates, and applications. This practice helps to minimize the risk of introducing malware into the organizational environment. The other options (A, B, C) represent good practices that help in reducing the likelihood of malware infections by avoiding potentially harmful actions.

References:The CREST CPTIA materials from EC-Council provide guidance on best practices for malware prevention and response, underscoring the importance of relyingon trusted sources for software and application downloads as part of a robust information security strategy.