You have a Windows Vista-based computer that has an antivirus application installed. However, Windows Security Center does not detect that a valid antivirus application is installed on the computer. Instead, Windows Security Center displays the following statuses for firewall and malware protection:

• Firewall: Windows Firewall is turned off.
• Malware protection: Windows did not find antivirus software on this computer.

On a Windows Vista based computer that runs Symantec AntiVirus 10.2 client, you enable EFS for documents on the Desktop or in the Documents folder. After you reboot the computer and log on again, the encrypted files cannot be decrypted.

The problem does not occur when folders are encrypted in other locations.

Also, when Symantec AntiVirus is uninstalled the problem goes away.

An overview of Windows Vista Defender feature.

On November 8th Jim Allchin, the co-president of the Platform Products and Services Group at Microsoft said that the new lockdown features of Vista are good enough that he could let his seven-year old son use it without antivirus software installed.
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