Help keep your PC safe

Windows security

Man using laptop running Windows

The latest versions of Windows* come with Windows Defender to help protect your PC from viruses and other kinds of malware.

If you’re looking to protect a PC with an older version of Windows*, Microsoft Security Essentials helps guard against viruses, spyware and malicious software of all kinds. You can’t put a price on protection – so we didn’t. Designed to be easy to use, Microsoft Security Essentials is a free** program that runs in the background, so you don’t have to be bothered by updates or interruptions.

Stay up to date

Install the latest service packs or other free** updates to help make Windows more reliable and secure.

Get more tools

This is the place to find useful extras, utilities and add-ons to get the most out of your PC.

* Windows Defender is included in Windows 8, Windows RT, Windows 8.1, Windows RT 8.1 and Windows 10. Microsoft Security Essentials supports Windows 7 and Windows Vista. As of April 8, 2014, technical support for Windows XP and Windows XP Mode are no longer available, including updates that help protect your PC. Learn more about Windows XP end of support

** Internet access fees may apply while downloading.

See more

Find info about virus removal, security settings, firewalls and other ways to protect your PC.

Learn more about drivers for your devices and hardware.

Get to know the latest features in Windows 10.

Explore an exciting new generation of PCs designed for Windows.