What action is typically taken by antivirus software after detecting a virus?

Antivirus software is designed to protect computer systems by detecting, preventing, and removing malicious software, such as viruses. When a virus is detected, the typical action taken is to quarantine and remove the malicious software to mitigate any potential harm to the system. Quarantining involves isolating the detected threat from other files and processes on the computer to prevent it from executing or spreading further. Once it is safely contained, the software may then remove the malicious entity entirely or allow for further action based on user preference or policy.

This procedure is crucial for maintaining system integrity and security, ensuring that users can continue to operate their systems without the risk of infection and damage that might arise from active malicious software. The other options do not adequately address the risk posed by the detected virus, highlighting why quarantining and removal is the most effective and commonly implemented response by antivirus programs.