1. Install EPLAN2.7 (WIN1064 bit).

2. Disable digital signatures in WIN10 (how to do it, check it yourself).

3. Add outdated hardware in the device management and see if it can run EPLAN after adding it.

4. If not, check whether the multikey just added has an exclamation mark in the device manager.

5. If there is a problem with the driver, EPLAN cannot be run.

6. At this time, download a driver and repair it. You will be prompted to repair the one you just installed.

7. The repair is completed.