Disconnect the computer from the internet
Unplug external drives and USB devices
Boot into Safe Mode
Run a full scan with updated antivirus software
Run a second scan with a trusted anti-malware tool
Quarantine or delete detected threats
Remove suspicious browser extensions and add-ons
Uninstall unfamiliar or recently installed programs
Clear temporary files and browser cache
Check startup programs and disable suspicious entries
Update the operating system and all software
Change passwords from a clean device
Restore the system from a clean backup if needed
Reset the browser settings if hijacked
Reinstall the operating system if the infection persists