Introduced in September 2009, Microsoft Security Essentials (MSE) replaced Microsoft's antivirus subscription service (see Windows Live OneCare) and its Defender antispyware software (see ...

So having good antivirus software at your back is vital. At the most basic level, you should have Microsoft’s built-in ...

Install anti-virus and anti-spyware software such as Microsoft Security Essentials and keep it updated. Use caution when you click links in e-mail or on social networking Web sites. Use a standard ...

Microsoft Security Essentials is not available on Windows 11, as it has been replaced by Microsoft Defender Antivirus, which is built into the operating system. To enable Microsoft Defender ...