Okay lets try the ipconfig/all command again:
In Windows, select Start > Programs > Accessories > command prompt > right click and run as administrator > click yes and you will be @ the Command Prompt.
Then either copy and paste or type: ipconfig/all>ipconf.txt
and then press return (you should see a brief flash of the cmd screen)
Next either copy and paste or type at the prompt: ipconf.txt
and press return again.
Now notepad opens and shows the file.
And as kaktussoft suggested:
Select all text (CTRL+A), then copy (CTRL+C). And paste on forum (CTRL+V)
Or highlight all the text in notepad, right click and copy, then paste to forum message box.
I dont see why this shouldnt work, so try that and then maybe we can help further?