Disconnect the computer from the internet
Disconnect external drives and USB devices
Restart the computer in Safe Mode
Run a full scan with updated antivirus software
Run a second scan with a trusted anti-malware tool
Quarantine or delete all detected threats
Uninstall suspicious programs
Remove unknown browser extensions
Clear temporary files and browser cache
Check startup programs and disable suspicious entries
Update the operating system and all software
Change passwords after the system is clean
Restore files only from trusted backups
If the virus remains, back up important files and reinstall the operating system