I noticed that when you download R for Mac they discuss the builtin command line utilities that you can use to check the file integrity. However, on the Windows download site they refer to external programs to download for this purpose. The link to the command line utility appears to be broken, and in addition to this, there is a builtin command that can be used in Windows 10, and possibly Windows 7. The command is:
CertUtil -hashfile file-location hash-type
Who would I notify about possibly updating the R Windows download page? I personally prefer to not download programs for which a good builtin alternative exists for the purposes I intend to use it for...
Here is the source for the Windows builtin command line command: