进行设置

I installed go binary for windows 64 and set up Go Paths like

I also downloaded it from git. Why wont it find the go command?

I also downloaded it from git

The Go repo (github.com/golang/go) wouldn't include the go binary.
Only the msi or the archive at golang.org/dl/ would (like go1.4.1.windows-amd64.zip) would.

You can unzip the archive anywhere, and set GOROOT to it, and %GOROOT%\bin will point the the go binary.

Add under user variables: GOPATH: C/:go

Add under systems variable: C:/go