To help ensure your device is not infected with a computer virus, you should take the following steps:

1. Install antivirus and anti-malware programs from reliable sources and keep them updated.
2. Disable any unnecessary services or programs as they may increase your vulnerability.
3. Scan your computer regularly, preferably using an up-to-date antivirus program.
4. If you receive a file from someone outside of your organization, scan it with your antivirus program before deciding to open it.
5. Consider using browser add-ons to guard against malicious websites and phishing attempts.
6. Be mindful of suspicious emails and links, and never open any attachments unless you are sure they are safe.
7. Also keep your browser and operating system updated with the latest security patches.