Solution
To recover from this error, the configuration file must be deleted so that NI Update Service can recreate it.
You can find the configuration file in one of the following locations:
C:\Documents and Settings\All Users\Application Data\National Instruments\Update Service\config.ini
- Microsoft Windows Vista/7/8/10:
C:\ProgramData\National Instruments\Update Service\config.ini
After you delete the file, relaunch NI Update Service to recreate the configuration file. Information about which updates have been selected to be hidden will be lost and all updates will be displayed as new, but the program should operate normally.