Official Go download page, this link gives you more option to choose from OS platform and OS architecture x86-64 build. And you can use the go build command parameter to building a binary for an application that can run for CPU of x86 (386) and x86-64.
Open the MSI file you downloaded and follow the prompts to install Go. The default folder used is C:/go. Or choose any folder that Windows 10 security may not ask for an administrator password for install programs/files using that folder path.
System Environment variable created by MSI installer
Note: loginname is the user name to Window login
Launch a windows terminal, type go version
go version go1.15.6 windows/amd64 output confirmed go installation has been successful. Otherwise, use the Windows Control panel app -> Programs find go1.15.6 has been program has been installed.
Google, Go forum, and Stackoverflow for assistance.