Unable to compile c++ project "cl.exe STATUS_DLL_NOT_FOUND"

hey,

I recieve below error message when trying to compile a new c++ project.

Error executing C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\bin\amd64\cl.exe (tool returned code: STATUS_DLL_NOT_FOUND)

when I try to build from source using VS2015 I get a different message

Severity	Code	Description	Project	File	Line	Suppression State
Error	MSB3075	The command ""C:\Program Files\Epic Games\UE_4.17\Engine\Build\BatchFiles\Build.bat" MyProjectEditor Win64 Development "C:\Users\Stan\Documents\Unreal Projects\MyProject\MyProject.uproject" -waitmutex" exited with code 5. Please verify that you have sufficient rights to run this command.	MyProject	C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V140\Microsoft.MakeFile.Targets	41	

does anyone know what DLL I might be missing?