Appendix A Installing a USB Driver 
A-13 
A.4 Installing the USB Driver for an AH500 Series CPU 
module in Windows 10 
Windows 10 driver signature enforcement provides a way to improve the security of the operating 
system by validating the integrity of a driver or system file each time it is loaded into memory. 
However since Delta PLC USB driver does not include the driver signature, this section will help 
users to disable driver signature enforcement functionality in Windows 10 to ensure a success Delta 
PLC USB installation. This act is only valid for a single time. The setting will return to its original 
state after restarting. 
Steps to disable driver signature enforcement in Windows 10:   
 
1.  Click Start and then Settings.   
 
 
 
2.  Select Update & security