The government's Homeland Security office is recommending uninstalling Apple's QuickTime for Windows software. Developed decades ago to play .mov video, and it's not longer needed while security vulnerabilities have been found in the program.
Computer systems running unsupported software are exposed to elevated cybersecurity dangers, such as increased risks of malicious attacks or electronic data loss. Exploitation of QuickTime for Windows vulnerabilities could allow remote attackers to take control of affected systems.
Apple will no longer be providing security updates for QuickTime for Windows, leaving this software vulnerable to exploitation. Computers running QuickTime for Windows will continue to work after support ends. However, using unsupported software may increase the risks from viruses and other security threats. Potential negative consequences include loss of confidentiality, integrity, or availability of data, as well as damage to system resources or business assets. The only mitigation available is to uninstall QuickTime for Windows.
Uninstall QuickTime 7 from Control Panel, as you would other programs on your PC. When following Microsoft's instructions for uninstalling programs, choose QuickTime 7 as the program to uninstall.
Or use Windows Search to find “Uninstall QuickTime,” and start the process that way.