Firewall
By default, Windows® 7 includes an Inbound Firewall. Their system supports an Outbound firewall that will not work by default. ZoneAlarm's #1 Firewall has taken Firewall technology a step further by automatically including Inbound, Outbound and the highly specialized OSFirewall™. The OSFirewall™ is crucial since it guards suspicious behavior all the way down to the operating system level. This technology is what sets our Firewall apart from the rest.
Browser
Windows 7 IE8 only blocks known dangerous websites and downloads. It will not block new sites and downloads, or prevent drive-by downloads and browser exploits from harming your PC. All of these important browser security features plus more are included in our award-winning ZoneAlarm® Extreme Security or ZoneAlarm® ForceField™.
Antivirus
An independent study by av-test.org found that even the best antivirus engines miss over 30% of 'dynamic' (new) virus threats. This is true for any standalone antivirus solution, from Microsoft or anyone else. The ZoneAlarm OS Firewal™ was built to combat this threat - it catches suspicious and unauthorized activity on your PC, thus protecting you from dynamic virus threats.
Summary
Microsoft has made a much anticipated new operating system. However, the hackers will continue to find ways to bypass whatever security measures the operating system puts in place. Operating systems, by their nature, do not evolve as quickly as threats do.

Your best bet at maintaining complete PC protection is to invest in an advanced security solution.

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Compare Security Features
Security Features
Windows® 7
and Vista
FIREWALL
Inbound & Outbound
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Full Stealth Mode
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OSFirewall™*
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ANTIVIRUS
Antivirus/Anti-Spyware
1
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User Access Control
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Program Monitoring
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Behavioral Rootkit Detection
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BROWSER SECURITY
Blocks known dangerous sites & downloads
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Blocks known dangerous sites & downloads not yet reported
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Stops browser exploits, drive-by downloads
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Stops plug-in and web application exploits
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IDENTITY & DATA PROTECTION
Daily Credit Report Monitoring, Alerts +
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Victim Recovery Service +
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Hard Drive Encryption
2
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Password and Disk Recovery for Encryption
check3
Online Backup
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OTHER SECURITY
Parental Controls
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Anti-spam
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* Using standard tests available online, more details at ZoneAlarm.com
+ US Only
1. Standalone anti-virus and anti-spyware available separately for free in
    Microsoft Security Essentials.
2. Microsoft includes hard drive encryption only in their top of the line
    "Ultimate" version of Windows 7 and Vista.
3. Hard Drive Encryption for laptops is available for an additional fee.