Click on `start.bat`, not on `nim.exe` and run something like `cd path_to_hello_nim` and then `nim c -r myhello.nim`. You don't need PCRE or SSL, Nim ships with them. You don't need to install MingGW, `finish.exe` does that for you, you need to let finish.exe write the PATH. And by now your computer setup is probably so messed up that nothing works, read about the basics of your operating system, presumably Windows:
[http://www.voidspace.org.uk/python/articles/command_line.shtml](http://www.voidspace.org.uk/python/articles/command_line.shtml)
