Security software products, such as those designed to detect and protect computers against malware or viruses, have been known to cause this situation.

Exclude ProSeries or ProSeries Basic Edition from its processes, and this should enable the software to read the data file(s).  

In the event the security software does not provide a way to exclude ProSeries or ProSeries Basic Edition, then you may need to uninstall the security software product to regain access.

We suggest if you are not comfortable uninstalling the security software or are unsure how to do this, please contact a local technician for further assistance.