Microsoft Security Essentials
Download real-time protection for your PC – for free! This Microsoft security program protects PCs against viruses, spyware, and other malicious software.
- Easy to get, easy to use. No cost, no registration, and no billing/personal information required.
- Comprehensive PC protection. Defend your computer against viruses, Trojans, and other malicious software, along with free spyware protection. It also automatically updates with the latest spyware protection technology.
- Quiet protection. Runs in the background, keeping you safe from threats and scanning your computer when it's idle. Or, you can conduct a manual scan of a file, a folder, or your entire PC, at any time. You'll only receive alerts when you need to take action.