windows10 universal c runtime requirement

Windows 10 Universal C Runtime Requirement (Pre-Windows 10 only)

Windows 10 Universal C Runtime is required for mssql for Visual Studio Code to function propertly on older version of Windows. This is a known issue in the .NET Core project. See .NET Core Pre-reqs for more detail.

mssql extension support for Windows versions

Windows version	Supported	Need to install the pre-req?
Windows 10	YES	NO
Windows Server 2016	YES	NO
Windows 8 and 8.1	YES	YES if not installed already
Windows Server 2012	YES	YES if not installed already
Windows 7	YES	YES if not installed already
Windows Server 2008 R2	YES	YES if not installed already

Instruction to install the pre-req for the mssql extension

1. Download WindowsUCRT.zip (7.7MB) and extract it to a folder.
2. Run the installer (.MSU) targeting your current OS configuration.