A missing .dll file may prevent the STK License Server (noted on Win2008 R2 and Win2012 severs) from starting. You will receive the following error message:
The program can't start because VCRUNTIME140.dll is missing from your computer. Try reinstalling the program to fix the problem.
The solution is to install the VCRedist-2015 file attached to this article (can also be found on the STKv11.3 Install DVD here: .\Prerequirements\VC 2015 Redist 14.0.24212\
). The current license server is 32-bit only at this time, so you will need the VCRedist-2015-x86.zip (the 64-bit vcredist is being provided for other STK applications that may be missing a required dll).