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I can't install Microsoft Security Essentials
Learn the different steps you can take when you are having problems installing Microsoft Security Essentials on your computer.
How do I remove a computer virus?
Learn about antivirus programs, online scanners, and tools that help remove malicious software from your computer.
How can I help protect my PC from viruses?
Learn about Windows Defender, Windows Update, and other ways you can help prevent malicious software from running on your PC.
How do I find and remove a virus?
Learn about antivirus programs, online scanners, and tools that help remove malicious software from your Windows PC.
Windows Defender and Windows SmartScreen fight viruses and other malware - Microsoft Windows
Use Windows Defender and Windows SmartScreen to help protect it against viruses, spyware, and other malicious software.