Run specific program from command line

"Add its directory to your PATH.

Right click My Computer and select Properties
Navigate to the Advanced tab and click the Environment Variables button

Select PATH and hit edit

append a semicolon with the directory location of VIM's executable

Take the version you don't want to use out of the System32 folder."

Or, if you need to keep both versions, make sure the path for the one you want is ahead of the path of the one you don't want. In the example above, c:\ruby\bin was at the head of the path variable, so anything in there will match first: c:\ruby\bin\vim.exe (not that you'd put it there!) would run before the one in Program Files.