It's also a good idea, especially if you're running Win7 x64, to
Bypass the Unwelcome Screen by creating Desktop shortcuts for the Organizer and the Editor, and restarting your computer.
The Editor's executable is:
"C:\Program Files (x86)\Adobe\Photoshop Elements 10\PhotoshopElementsEditor.exe"
The Organizer's executable is:
"C:\Program Files (x86)\Adobe\Elements 10 Organizer\PhotoshopElementsOrganizer.exe"
The Unwelcome Screen leaves a zombie process running which prevents the actual program from launching again.