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At this point in time, the Redmond company plans to deliver Windows Seven, Vista's successor in both x86 and x64 versions. But focusing on the x64 editions of Windows Vista, security is without a doubt a key aspect. Microsoft did applaud Vista as the securest Windows operating system available, and in this context, x64 Vista is the apex. The paroxysm is of course delivered by additional security mitigations implemented into x64 Vista such as PatchGurard or the Kernel Patch protection technology and mandatory data signing.

Still, it is important to be well aware of the fact that neither the 32-bit nor the 64-bit editions of Vista are silver bullets, or panaceas for the security problem. Users should continue to deploy antivirus software in tandem with Vista, just as they did with older versions of Windows. On January 30 2007, when Vista hit the shelves, there was little choice in terms of security measures, even for the x86 versions of the operating, not to mention the x64 editions. But in the six months that have passed since then, the security market matured sufficiently around Vista in order to produce a healthy offering of solutions to safeguard the operating system. The security products enumerated bellow are not part of a ranking. They are in alphabetical order, and they all have a common aspect. All the products have been tested on a 64-bit edition of Windows Vista Business and are recommended for the operating system by the VB100 award.

AVG Antivirus Professional 7.5.476a1043 - "AVG Professional Single Edition is perfectly designed to give you the maximum antivirus protection for your single home PC or workstation. AVG Professional is simple to install and operate. No IT expertise is required and it can run in the background, providing uninterrupted protection. All file and e-mail activity is checked automatically, allowing you to get on with your work without worrying about viruses."

Kaspersky Anti-Virus Personal 7.0.0.125 Final - "Kaspersky Anti-Virus (KAV) provides all types of anti-virus protection: antivirus scanners, monitors, behavior blockers and integrity checkers. Kaspersky Anti-Virus supports all of the most popular operating systems, e-mail gateways and firewalls. KAV controls all possible virus entry points.Kaspersky Anti-Virus Personal is an antivirus software that protect you PC from viruses. Compatible with Windows Vista !"

McAfee VirusScan 2007 11 - "With the wide variety of viruses, hackers and blended threats lurking on the Internet today, you need more than a simple anti-virus program to keep your PC and files secure. McAfee VirusScan Plus AntiVirus, Firewall & AntiSpyware provides the essential protection you need to surf the Web and download files safely."

Microsoft Forefront Client Security Evaluation Edition - "Microsoft Forefront Client Security provides unified malware protection for business desktops, laptops, and server operating systems that is easy to manage and control. Built on the same highly successful Microsoft protection technology already used by millions of people worldwide, Forefront Client Security helps guard against emerging threats, such as spyware and rootkits, as well as against traditional threats, such as viruses, worms, and Trojan horses."

Norton AntiVirus 2007 14.4.0.12 - "Symantec's Norton AntiVirus 2007 is the world’s most trusted antivirus solution. It removes viruses, worms, and Trojan horses automatically - without interrupting your work. New Norton Internet Worm Protection blocks certain more sophisticated worms (such as Blaster and Sasser) before they enter your computer. Norton AntiVirus can also detect spyware and other non-virus threats."

Sophos Anti-Virus - "Sophos Anti-Virus performed splendidly during tests on 64-bit Windows Vista with its in-depth configuration options, impressive speed and excellent detection rates," said John Hawes, technical consultant at Virus Bulletin. "By protecting against all the in-the-wild viruses without false positives, Sophos has proved itself worthy of another VB100 award."

Windows Live OneCare 2.0.2284.28 - "Introducing Windows Live OneCare, the all-in-one, always-on PC care service from Microsoft. It works quietly in the background on your computer, so you don't have to worry about nasty interruptions from viruses, spyware, hackers, and other unwanted intruders. It also goes beyond security, regularly backing up all your important files and cleaning up and tuning up your computer to help keep it running at top speed. Because you have better things to do with your PC."