Computer Support/Software Troubleshooting/PC Security

This lesson covers troubleshooting PC security.

Objectives and Skills

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Objectives and skills for the troubleshooting PC security portion of A+ certification include:[1]

Given a scenario, troubleshoot common PC security issues with appropriate tools and best practices.
  • Common symptoms
    • Pop-ups
    • Browser redirection
    • Security alerts
    • Slow performance
    • Internet connectivity issues
    • PC/OS lock up
    • Application crash
    • OS updates failures
    • Rogue antivirus
    • Spam
    • Renamed system files
    • Files disappearing
    • File permission changes
    • Hijacked email
      • Responses from users regarding email
      • Automated replies from unknown sent email
    • Access denied
    • Invalid certificate (trusted root CA)
  • Tools
    • Antivirus software
    • Antimalware software
    • Recovery console
    • Terminal
    • System restore/Snapshot
    • Pre-installation environments
    • Event viewer
    • Refresh/restore
    • MSCONFIG/Safe boot
  • Best practice procedure for malware removal
    1. Identify malware symptoms
    2. Quarantine infected system
    3. Disable system restore (in Windows)
    4. Remediate infected systems
      • Update antimalware software
      • Scan and removal techniques (safe mode, pre-installation environment)
    5. Schedule scans and run updates
    6. Enable system restore and create restore point (in Windows)
    7. Educate end user

Readings

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Multimedia

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  1. YouTube: Troubleshooting Common Security Issues - CompTIA A+ 220-902 - 4.2
  2. YouTube: Tools for Security Troubleshooting - CompTIA A+ 220-902 - 4.2
  3. YouTube: Best Practices for Malware Removal - CompTIA A+ 220-902 - 4.2

Activities

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References

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