Windows XP SP2 Tips: IE Problem Solving

Why IE opens certain files in plain text
Phenomenon:
When opening an mp3 media file in http in IE, the mp3 file is displayed as plain text.< Br>Analysis:
This phenomenon is caused by a mismatch between the file extension and the content, or a mismatch between the content type reported by the server and the extension or content of the file. To resolve this completely, you need to contact this website. Administrator to fix this problem.
Resolved:
This is an enhanced security feature of IE in Windows XP SP2 - MIME Handling Enforcement. We do not recommend disabling this security feature unless it is a last resort. This security feature of IE can be modified by the registry:
HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Internet
Explorer\\Main\\FeatureControl\\FEATURE_MIME_SNIFFING
iexplore.exe: 0 (REG_DWORD)
-or -
HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Internet
Explorer\\Main\\FeatureControl\\FEATURE_MIME_SNIFFING
iexplore.exe: 0 (REG_DWORD)
On the other hand, users can also modify The security settings in the area where the content is not displayed properly. This setting can be customized by modifying the custom level button in the security area, and the 'Open files based on content, not file extension' setting item Modify (Enable/Disable).
Why is there a red Security Center icon on the task tray?
After installing the Windows XP SP2 service pack, a red Security Center icon sometimes appears in the task tray area, but Sometimes it does not appear.
The Security Center icon does not work under normal conditions. Even if it is manually opened, only the green icon will appear in the task tray area. Red appears, indicating that the current system has the following conditions:
Firewall Not enabled
Automatic update is not enabled
Virus protection software has expired (usually referred to as virus definition library)