Recover Office 2010 password from backed up drive

I had copied all the files off my hard drive before upgrading my motherboard.  I looked everywhere for my license key for Office but couldn't find it.  Luckily it proved pretty easy to recover.  I used the free ProduKey software from NirSoft ( http://www.nirsoft.net/utils/product_cd_key_viewer.html ).

1.  Simply download and run the program.  I had to start it as administrator.  
2.  Go to the file menu and choose Select source. 
3. Check the box to load the product key from external windows directory
4. Choose browse and select the windows directory from your old hard drive
5. Click Ok and after a quick search your key will be displayed.
6. Click on your key and save it to text file.  put the text file someplace safe.
7. Bookmark this post for when you can't remember where that someplace safe was.