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

Simple solution, use quotes:

c:> "C:\Program Files\WinZip\wzunzip.exe"

if you run this, you don't need to worry about the space in Program Files.

Hope this help.