Users interested in Microsoft windows defender 6.1.7600 generally download:
Windows Defender is the well-known security tool from Microsoft that protects your system and your data against spyware and other malicious applications. Formerly named “Microsoft AntiSpyware”, Windows Defender is included by default in the latest 3 Windows editions (Vista, 7 and 8) and can be downloaded and installed separately on Windows XP and Windows 2003.