R CMD on Windows 7 Error - “R” is not recognized as an internal or external command,

Question

I\'m exploring package building on Windows 7 but have been running into trouble after reaching the Command Prompt stage. The following thread appears to be on the same topic

Answer 1

• Have you closed the command prompt and opened a new one after adjusting the PATH?
• Enter the command PATH on the command line and ensure that you are properly updating your path
• Try navigating to the directory where R.exe is saved and running it locally -- cd C:\Program...\bin\x64, R.exe.
• Ensure that you're running on Windows' Command Prompt and not Cygwin's terminal
• If you actually have a space after the semi-colon in your PATH, you'll need to remove that: /bin;C:/Program.... Try combining that with Joshua's solution.