An error telling you that windows can't find the file specified, especially in the context of an attempt to run a program as Sublime is doing when you try to execute a build, is usually indicative of the thing you're trying to run not being properly set up in the system
PATH and you haven't provided a full path to the thing you're trying to run (i.e. windows can't run what you're asking it to because it can't find it)..
In order to work from Sublime, you need to be able to open a windows command prompt and enter what Sublime is trying to run and have it work.
For example, if you were trying to run python, you should be able to do this:
Python 3.6.0 (v3.6.0:41df79263a11, Dec 23 2016, 08:06:12) [MSC v.1900 64 bit (AM
D64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
If on the other hand you try to run the program and you see something like the following, windows can't execute the program because it doesn't know where it is:
'python' is not recognized as an internal or external command,
operable program or batch file.
In this case you need to either either add what you're trying to run to the
PATH (search google for the appropriate steps for your version of windows) or modify the build system to specify exactly where the thing you're trying to run is.