Prevent, detect, contain and remediate malware

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Compare common malware categories including viruses, worms, trojans, ransomware, spyware, rootkits and potentially unwanted programs.
Identify malware symptoms such as performance degradation, unwanted redirects, disabled security tools, pop-ups, encryption of files and unusual process activity.
Apply prevention measures including patching, least privilege, application control, safe downloading practices and current anti-malware protection.

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Perform basic containment and remediation steps by isolating affected systems, disabling unnecessary connectivity, updating signatures, scanning, removing or quarantining threats and validating system operation afterward.

Explain post-remediation actions including restoring clean data, changing compromised credentials, monitoring for recurrence and educating the user on the infection vector.

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