I. How to convert Trial Office Professional 2007 to complete version without paying
1. this is only for 64bit Windows (x64) users
2. open regedit in run
3. got to this key:
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Office\12.0
4. click on registration subkey
5. you can see many things like this
{90120000-001C-0409-0000-0000000FF1CE}
6.click on each one of them and delete the following things
(i) Product ID
(ii) Digital Ids
7. close and restart
8. open an office 2007 app and enjoy!!