Malware never gets a quiet day
Cloud-powered, real-time scanning blocks viruses, ransomware, spyware, and zero-day attacks before they can run. Always on. Always learning. Always faster than the threats.
- Blocks viruses, ransomware, and spyware
- Zero-day protection with cloud detection
- Schedule scans or run on demand
- Lightweight, no slowdown
4.7/5 from 12,000+ reviews
Four layers of always-on defense
Every download, install, and click is checked before it ever touches your data.
Real-time scanning
Every file is checked the moment it lands on your device. Threats are stopped before they execute.
Cloud detection
Our global threat graph spots new malware within minutes, so you are protected from things others have not even named yet.
Scheduled scans
Set it once and forget it. Smart scans run quietly in the background on your schedule.
Quarantine and clean
Suspicious files are isolated in a secure quarantine and removed safely with one click.
Stop threats before they execute
Most antivirus checks files after they run. 365 Antivirus inspects every executable, installer, document, and download the instant it touches your device, using a hybrid of local signatures and live cloud intelligence.
- Pre-execution scanning of every file
- Heuristic and behavioral analysis catches unknown malware
- Browser-level shield against drive-by downloads
- Cloud lookup adds zero noticeable latency
Your files stay yours, even under attack
Ransomware is the fastest growing threat to households. The ransomware shield watches the file system for the patterns ransomware uses, blocks the process the moment it starts encrypting, and restores any files it touched.
- Behavior-based ransomware detection
- Automatic rollback of affected files
- Protected folders for photos, documents, and backups
- Works offline once installed
Phishing and scam sites blocked at the source
Most malware does not come from a file, it comes from a link. WebShield checks every site you open against a live reputation graph and blocks fake, spoofed, scam, and phishing pages before the browser can load them.
- Live URL reputation in every browser
- Catches typo-squatted domains and spoofed login pages
- Warns before downloads on shady sites
- Works in Chrome, Edge, Safari, Firefox
Heavy on protection, light on your device
Old-school antivirus owns a reputation for slowing computers down. 365 Antivirus pushes the heavy lifting to the cloud, sleeps when you game, and never blocks your work.
- Game mode pauses scans during full-screen apps
- Background scans throttle when on battery
- Less than 2% CPU at idle, under 60 MB RAM
- Smart scans only re-check what changed
Works on every device you own
Install on every device you own. One subscription covers your whole household.
“Switched from a big-name suite and never looked back. It caught a phishing site my old antivirus waved right through.”
One subscription, every layer of protection
Get every 365 product in a single plan. Cancel anytime, with a 30-day money-back guarantee.
Frequently asked questions
Still curious? Reach our support team any time of day, any day of the year.
Defender is a solid baseline, but it only sees Windows. 365 Antivirus protects Windows, macOS, iOS, and Android from one dashboard, adds phishing and ransomware shields, and uses a cloud threat graph that updates in real time.
Stop the next threat before it reaches you
Join 40M+ devices already protected by the 365 suite. Set up in minutes, cancel any time.