Update your operating system
Update your antivirus software
Disconnect from unknown networks
Back up important files
Open your antivirus or security app
Run a full system scan
Run an offline scan if available
Scan external drives and USB devices
Review detected threats
Quarantine or remove detected malware
Restart your device
Run a second scan
Check installed apps and remove suspicious ones
Check browser extensions and remove suspicious ones
Clear temporary files
Change passwords from a clean device
Enable real-time protection
Enable firewall protection
Keep automatic updates turned on
Contact a professional if malware remains