Problem:
PRTK version 8.1.0 and later are throwing an error on a Windows machine: "The program can't start because api-ms-win-crt-runtime-l1-1-0.dll is missing... "
Solution:
Download and install an update to Windows. Link to the OS update is below.
https://support.microsoft.com/en-us/help/2999226/update-for-universal-c-runtime-in-windows
Applies to:
PRTK versions 8.1.0 and later and the following OS's:
Windows 7
Windows 8.1
Windows Server 2008 R2
Windows Server 2012 R2