What steps can be taken to troubleshoot and resolve HTML email display problems caused by antivirus software like AVG Free Edition?

The issue with HTML email display problems caused by antivirus software like AVG Free Edition can be resolved by disabling the email scanning feature in the antivirus settings. This will prevent the antivirus software from modifying the HTML content of the emails, allowing them to display correctly.

// Disable email scanning in AVG Free Edition antivirus software
// This code snippet demonstrates how to disable email scanning in AVG Free Edition

// Step 1: Open AVG Free Edition antivirus software
// Step 2: Go to Settings
// Step 3: Click on Basic protection
// Step 4: Uncheck the option for Email Shield
// Step 5: Save the changes and close the antivirus software