Microsoft Defender vs Norton Antivirus

Last updated: November 10, 2021

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Microsoft Defender
Microsoft Defender is working to protect your Windows 10 PC by scanning for malicious software. Microsoft Defender uses real-time protection to scan everything you download or run on your PC. It will turn itself off if you install another antivirus app.
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Norton Antivirus
In order to better protect you, we have substantially enhanced our security services. We took everything you loved about Norton AntiVirus and added better protection, improved performance and superior design to create Norton Security Deluxe. It’s the best of Norton for your PCs, Macs, smartphones and tablets.
Microsoft Defender vs Norton Antivirus in our news:

2021. Microsoft launches Defender for Business



Microsoft has introduced Microsoft Defender for Business, a new easy-to-use and cost-effective endpoint security solution that's specially built to bring enterprise-grade endpoint security to businesses with up to 300 employees. Defender for Business elevates security from traditional antivirus to next-generation protection, endpoint detection and response, threat and vulnerability management, and more. It offers simplified configuration and management with intelligent, automated investigation and remediation. Defender for Business helps you to protect against cybersecurity threats including malware and ransomware across Windows, macOS, iOS, and Android devices. It's available as a standalone offering costing $3 per user per month.


2021. NortonLifeLock and Avast merge in $8.1B deal



U.S. cybersecurity firm NortonLifeLock has acquired Czech rival Avast for $8.1 billion in order to create a global consumer security powerhouse. NortonLifeLock, formed in 2019 as a spin-off from Symantec, says the deal will create an industry-leading consumer cyber safety business and dramatically expand its user numbers thanks to Avast’s 435 million-strong customer base. Avast, founded in 1988, focuses on cybersecurity software for consumers and small and medium-sized businesses and describes itself as one of the largest security companies. However, the company has not been without controversy during its near-25-year history.


2020. Norton acquires Avira for $360M



NortonLifeLock announced that it would acquire the German security firm Avira for around $360 million in an all-cash deal. NortonLifeLock came into existence as a standalone company only last year after Symantec’s enterprise security business was acquired by Broadcom for nearly $11 billion. NortonLifeLock is itself today a publicly traded company with a market cap of about $11.5 billion. Avira, meanwhile, was until April of this year a bootstrapped tech business focusing mainly on security software for consumers. Its products include — like Norton itself — anti-virus software. Avira has a customer base of millions, covering about 30 million secured devices and 1.5 million paying customers. Avira has built its business around a freemium model that Norton said it plans to keep.


2016. Microsoft released Windows Defender Advanced Threat Protection


Windows already ships with built-in antivirus called Windows Defender. Currently, it’s a defensive program that looks at websites and downloads to try and stop you from getting hacked. Unfortunately, in the day and age of social engineering and spear-phishing, antivirus needs to be a little more proactive. The new cloud service Windows Defender Advanced Threat Protection is supposed to be that protection for large, company-wide networks. WDATP move the focus from monitoring individual files to the machine’s behaviour as a whole—rather than searching for the actual virus, it keeps an eye on symptoms. If your machine starts connecting to weird ports or executing unusual PowerShell commands—behavior that’s out of the ordinary for the vast majority of users—WDAPT will flag it to administrators, providing an overview of current and past behavior for admins to look at. Microsoft’s also trying to take advantage of the vast Windows install base to kickstart its antivirus program. Millions of suspicious files found on machines worldwide will be run on the cloud, building a giant centralized database of malicious files, but also malicious behavior.