In reply to Wolfram D..

@Wolfram: Dorico will almost certainly never be officially supported on Windows 7, but in practice it actually runs just fine on Windows 7, and I wouldn't anticipate any problems with using it on your system. To be safe, I suggest you wait for the trial version of Dorico, which will be available before the end of November, to try the software out on your system for 30 days in order to make sure it will work without problems.