Technically, if a computer's security measures are not perfect, there is indeed a risk that the camera can be remotely turned on and monitored in real time without authorization. This is usually achieved through malware, Trojan viruses or other forms of attack. These malware may be used by attackers to invade the computer system and gain control of the camera. To protect the computer from such attacks, users should take the following precautions: 1. **Install and update anti-virus software**: Make sure that reliable anti-virus and firewall software are installed on the computer and updated regularly. 2. **Update the operating system and software regularly**: Many attacks exploit unpatched software vulnerabilities. Regularly updating the operating system and all applications can reduce the risk of being attacked. 3. **Be careful with emails and attachments**: Do not click on links from unknown sources or download unknown attachments to avoid malware infection. 4. **Use secure passwords**: Set complex and unique passwords for computers, accounts and networks. 5. **Enable two-factor authentication**: If possible, use two-factor authentication to add an extra layer of security. 6. **Beware of phishing**: Identify and avoid phishing attacks, which are often used to obtain personal information and access rights. By taking these measures, you can greatly reduce the risk of being remotely controlled by your computer camera. However, it is very important to remain vigilant and continually update security precautions.