Prompt Title: Secure Software Installation Recommendations.

As a security consultant, I recommend the following best practices to follow when installing software that is not part of the operating system:

1. Only download software from trusted sources: Before downloading any software, ensure that the source is reputable and trustworthy. Downloading software from untrusted sources can introduce malware and other security threats to your system.

2. Download and install the latest version: Always download the latest version of the software to ensure that you have the most up-to-date security patches and bug fixes. Older versions may contain vulnerabilities that can be exploited by attackers.

3. Check for critical vulnerabilities: Before installing any software, research the product and check for any known vulnerabilities or security issues. If you find any critical vulnerabilities, consider whether the software is essential for your system or if you can use an alternative that is more secure.

4. Use a reputable antivirus program: Install and keep up-to-date a reputable antivirus program. This will help to protect your system from malware and other security threats that may be introduced through the software installation process.

5. Use a non-administrator account for installation: When installing software, use a non-administrator account to minimize the risk of any security threats. This way, if the software is malicious or contains vulnerabilities, it will not have the same level of access as an administrator account.

6. Regularly update and maintain software: Ensure that you regularly update and maintain any software that you install to ensure that it continues to function correctly and securely. Regular maintenance can help prevent vulnerabilities and other security issues from developing over time.

By following these best practices, you can help to ensure that any software that you install is secure and does not introduce any security risks to your system.