Does this happen to involve installing the software on a new machine? If so, it could simply be a compatibility issue where the software is too old to work with the new operating system.
Or has the software been working fine for years and it just changed - if so, were there any recent updates for the machine?
It worked fine for years. Windows 7 updates of course, no others.
Now I deinstalled it and try to reinstall. But again error: "The assistant was interrupted, before Adobe Photoshop Elements 9 could be installed completely." So they want me to buy a new version, ha?