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Sibelius 5 and 6 will not launch in Windows 7.

This can happen if there is a compatibility conflict with other running applications in Windows. To correct the issue, you will need to change some autorun settings.

– Download the autoruns program from Microsoft Sysinternals

– Install the application.

– Double click autoruns.exe and click YES or OK.

– In the “Applnit” tab, look for any entries and uncheck them.

– After making changes, close this window and try relaunching Sibelius.