We are experiencing the same problem on servers when upgrading from ESET EFSW 6.5.x to 7.0.12016.0. This happens on all servers with SQL installed. Has occurred with SQL 2012, 2014, and 2016. Running a repair of the SQL native Client does not fix the problem. The only fix we found, and not a good one, is if there is a SQL service pack upgrade available, installing that fixes the problem. Errors in event log every half hour - SQL Server Native Client 11.0: Unable to load sqlnclir11.rll due to either missing file or version mismatch. The application cannot continue. Hopefully ESET will figure this out and implement a fix. Meanwhile we are not pushing out any more upgrades to v7.x on servers.