You are running Symantec Encryption products on Windows 7 SP1. However, on January 14, 2020 this operating system reached the end of its extended support and you wish to know whether Symantec Encryption products are still supported on this operating system.
Support for any Encryption products running on Windows 7 SP1 ended on January 14, 2020.
This includes products that were supported on Windows 7 SP1 at the time of their release. For Endpoint Encryption, this was release 11.3.0 and for Encryption Desktop this was release 10.4.2 MP4.
Therefore please upgrade to a version of Windows that Microsoft supports and use a version of the Encryption product that supports that version of Windows.