Type any letter and then use Backspace to erase that letter.
I understand this. The dirty flag as MS call it.

Save and close the normal template.
This I don't understand. Save as -> a dotx file
but it wants to save it as doc2.docx not as the word system template.

Ah you said open the normal template. What does this mean.
Start Menu > All programs > Microsoft Office [folder] > Microsoft Office Word 2007 : Is this the Normal template?

I do have this:
C:\Program Files (x86)\Microsoft Office\Templates\1033

There are templates in there but nothing called normal.dotx