gistfile1.txt

Installing Ohai on Windows:

Install Ruby via one-click installer (I used ruby186-27_rc)
  http://rubyforge.org/frs/download.php/47082/ruby186-27_rc2.exe

Start the RubyGems Package Manager
  Programs -> Ruby-186-27 -> RubyGems -> RubyGems Package Manager

Add gems.opscode.com to gem sources.
  C:\Ruby>gem sources -a http://gems.opscode.com

Verify the following gems are installed first, they should be by default:
  C:\Ruby>gem list
	fxri
	fxruby
	hpricot
	log4r
	ptools
	rake
	ruby-opengl
	test-unit
	win32-api
	win32-clipboard
	win32-dir
	win32-eventlog
	win32-file
	win32-file-stat
	win32-process
	win32-sapi
	win32-sound
	windows-api
	windows-pr

Install ohai and wmi bindings
  C:\Ruby>gem install ohai ruby-wmi

Run Ohai:

C:\Ruby>ohai
{
  "dmi": {

  },
  "command": {

  },
  "kernel": {

  },
  "platform_version": null,
  "platform": "mswin32",
  "keys": {

  },
  "network": {
    "interfaces": {

    }
  },
  "ohai_time": 1247162366.84,
  "os": "mswin32",
  "counters": {
    "network": {

    }
  },
  "os_version": null,
  "languages": {
    "ruby": {
      "target_os": "mswin32",
      "platform": "i386-mswin32",
      "host_vendor": "pc",
      "target_vendor": "pc",
      "target_cpu": "i386",
      "host_os": "mswin32",
      "host_cpu": "i686",
      "version": "1.8.6",
      "host": "i686-pc-mswin32",
      "target": "i386-pc-mswin32",
      "release_date": "2008-08-11"
    }
  }
}