The Microsoft Safety Scanner was just released a few days ago. The free portable antivirus tool only comes as a simple EXE file and is available as a 32-bit and 64-bit version. The EXE file contains all the virus signatures.
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A portable antivirus program is useful whenever you want to scan a PC that lacks antivirus software. If you don't have a Microsoft antivirus scan engine installed (Microsoft Security Essentials or Forefront), you can use the Safety Scanner if you need a second opinion.
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Author: Michael Pietroforte
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