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When to trust a website
Learn how to decide whether a website is secure and trusted before you download software or do business online.
Security checklist for Windows
Help make your PC more secure by using features like Windows Defender, installing important updates, and backing up your files.
Security, privacy, &accounts - Microsoft Windows Help
Get help with security, privacy, and user accounts, including info about viruses, passwords, parental controls, firewalls, and drive encryption.
Windows Startup Settings (including safe mode) - Microsoft Windows Help
See a list of options available for starting Windows in diagnostic modes such as safe mode.
How do I know if a network is safe to connect to? - Microsoft Windows Help
Learn how to tell if security is enabled on wireless networks before you connect to them.