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MS Baseline Security Analyzer reports an IE zone security error (&quot;Some or all of the user settings for the following zones are below the recommended level&quot;) for user S-1-5-21-1182415113-829243<wbr />737-123582<wbr />0382-18050<wbr /> on my Windows 2000 desktop. The zone is Restricted Sites. The user is not valid, any ideas where it came from / how to fix? Thanks. 
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MS Baseline Security Analyzer reports an IE zone security error ("Some or all of the user settings for the following zones are below the recommended level") for user S-1-5-21-1182415113-829243737-1235820382-18050 on my Windows 2000 desktop. The zone is Restricted Sites. The user is not valid, any ideas where it came from / how to fix? Thanks. 

Microsoft Baseline Security Analyzer reports unknown user for IE

Operating system security (OS security) is the process of ensuring OS integrity, confidentiality and availability. OS security refers to specified steps or measures used to protect the OS from threats, viruses, worms, malware or remote hacker intrusions. OS security encompasses all preventive-control techniques, which safeguard any computer assets capable of being stolen, edited or deleted if OS security is compromised, including authentication, passwords and threats to systems and programs.

OS Security

Microsoft Forefront, formerly known as Internet Security and Acceleration Server (ISA Server), is a network router, firewall, antivirus program, VPN server and web cache that runs on Windows servers. It includes identity management and protection systems, and discontinued systems for threat management and network protection, along with protection for Sharepoint and Exchange. The scope of discussions includes forward and reverse proxy, application and service publishing, virtual private networks (VPNs), outbound access rules, SSL certificates and network routing within either a single node or an highly-available array pairing.