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RFPAL GUI Connection Issue to SC1905

Thread Summary

The user encountered a 'no adapter connected' error when trying to connect RFPALGUI to SC1905 or SC1894 eval boards using the Scintera SC-USB-SPI rev. 3 adapter. The issue was due to a driver digital signature verification failure (Code 52). The final answer directed the user to submit a technical support case on the Analog Devices support portal for further assistance.
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Category: Software
Product Number: SC1905
Software Version: RFPAL Advanced GUI 3.0.11.0

RFPALGUI cannot connect to SC1905 or SC1894 eval boards. The error message is "There is no adapter connected to USB port or the adapter is used by another application. Please restart the program with an adapter." 

I am using Scintera SC-USB-SPI rev. 3 to connect USB to SPI. I have verified that my PC finds the device. However, the device manager lists the following device status: "Windows cannot verify the digital signature for the drivers required for this device. A recent hardware or software change might have installed a file that is signed incorrectly or damaged, or that might be malicious software from an unknown source. (Code 52)" Can someone help me overcome the driver issues? Thank you!!