How many times you are working on attachment in emails, saved and exit the MS Word or Excel, and later realized you did not saved it to any folder. You tried to open the attachment again and the updates were just not there.

Next time it happen, do this:

1. Don’t panic, don’t open the attachment again.
2. Open regedit, then find the followings:

Outlook 97: HKEY_CURRENT_USER\Software\Microsoft\Office\8.0\Outlook\Security
Outlook 98: HKEY_CURRENT_USER\Software\Microsoft\Office\8.5\Outlook\Security
Outlook 2000: HKEY_CURRENT_USER\Software\Microsoft\Office\9.0\Outlook\Security
Outlook 2002/XP: HKEY_CURRENT_USER\Software\Microsoft\Office\10.0\Outlook\Security
Outlook 2003: HKEY_CURRENT_USER\Software\Microsoft\Office\11.0\Outlook\Security
Outlook 2007: HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\Security
Outlook 2010: HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Outlook\Security
Outlook 2013: HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Outlook\Security

Look at the folder path, and your items should be there.