Disconnect the computer from the internet
Disconnect external drives and USB devices
Restart the computer in Safe Mode
Run a full scan with trusted antivirus software
Update the antivirus software and virus definitions
Quarantine or delete detected threats
Run a second scan with a different trusted anti-malware tool
Remove suspicious browser extensions and add-ons
Uninstall unknown or recently installed programs
Clear temporary files and browser cache
Check startup programs and disable suspicious entries
Update the operating system and installed software
Change important passwords from a clean device
Restore the system from a clean backup if needed
Reset the browser settings if the browser is affected
Reinstall the operating system if the infection cannot be removed
Keep antivirus protection enabled after cleanup
Back up important files regularly after verifying they are clean