How to Use Antivirus Software

Install and run antivirus software to scan for and remove malware from your computer.

Steps

1
Choose a reputable antivirus program.
Popular options include Windows Defender, Bitdefender, Malwarebytes, and Norton. These run on Windows and Mac computers.
2
Download the software from the official website only.
Never download antivirus programs from pop-up ads or third-party download sites.
3
Install the program and run the initial full scan.
A full system scan checks every file on your computer. This may take an hour or more.
4
Review the scan results and quarantine any threats found.
The antivirus will list infected files and ask what action you want to take.
5
Schedule regular automatic scans
in the program settings. Weekly scans help catch new threats before they cause damage.

Do I need antivirus software on a Mac?Show

Yes, Mac computers can also get malware. While less common than Windows threats, Mac viruses do exist and antivirus protection is recommended.

Is free antivirus software good enough?Show

Yes, free options like Windows Defender provide solid protection. Paid versions offer extra features like VPN service and identity theft monitoring.

How do I know if my antivirus is working?Show

Check that the antivirus icon appears in your system tray or menu bar. Open the program to verify it is up to date and the last scan was recent.

Written by the HowToDoStuff.online editorial team. Last updated May 18, 2026.