Atom in windows

please excuse the noobery but when i try to run a python script in atom using ctrl,shift,b it gives me the message.

python was not found, run without arguments to install free from the microsoft store.

ive already installed the scripts package. ive already installed python and routeninja had this problem and he fixed it but it doesnt say how and i cant figure out how to message him. im thinking it might be an environmental thing but im to green to fix it. any help would be appreciated.