If you still have issues, share your Windows version and error code below.
Upon reboot, press or F7 to select "Disable driver signature enforcement." Re-run the driver installation steps above. 2. "Device Not Found" Error in UPA Software Upa Usb Programmer 1.3 Driver Download LINK
Windows 10/11 blocked the older driver. Fix: Reinstall using the disable driver signature enforcement method. Alternatively, use the Prolific Driver v1.8.0 designed for legacy devices. If you still have issues, share your Windows
This guide provides everything you need, including direct download links for the software package and a detailed step-by-step installation walkthrough to get your device up and running correctly. "Device Not Found" Error in UPA Software Windows
To use the Upa USB Programmer 1.3 with your computer, you need to install a compatible driver. The driver enables your computer to recognize the programmer and communicate with it properly. Without the driver, the programmer won't function correctly, and you won't be able to program or debug your projects.
Right-click the software shortcut, go to Properties > Compatibility , and set it to run in compatibility mode for Windows XP (Service Pack 3) or Windows 7 .