3.2 Common Security Issue Symptoms: Access Denied, Invalid Certificate, Logs 3. Software Troubleshooting (220-1002), Comptia A+ (Plus), Comptia A+ (Plus) 220-1002 This entry is part 222 of 278 in the series Comptia A+ (Plus) 220-1002 Series Access denied Invalid certificate (trusted root CA) System/application log errors Author: Previous Article 3.2 Common Security Issue Symptoms: Hijacked Email Next Article 3.3 Best Practice Procedures for Malware Removal Latest Posts Storage Area Network (SAN) APM and ACPI Acceptable Use Policy