The internet can be a dangerous place. Keep your home or small-business PC better protected with Microsoft Security Essentials. Help 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.
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Install the latest service pack to keep your PC up to date. A service pack is a free* update to Windows that helps make Windows more reliable and secure, with security and performance improvements and support for new types of hardware.
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This is the place to find useful extras, utilities, and add-ons to get the most out of your PC.
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