Windows cannot verify the digital signature of the drivers required for this device

I downloaded RealPort installation software for Windows 7 professional 40002549_K (driver version 4.11.491.0) for virtualization of serial ports (TS 4 H MEI), but the driver’s digital signature error occurs, preventing the installation and recognition of the serial ports by Windows.
I tried to disable driver signature enforcement in Windows, it worked by allowing the driver to be installed, but when Windows is restarted the problem returns.
Is there any way to fix this problem?

Disabling driver signature enforcement temporarily solves it, but the issue returns after a restart. Have you tried updating to a newer driver version or checking for compatibility with Windows 7? That might help resolve the problem permanently.