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Auzentech Prelude wrecks Sibelius 7 due to ctaud2k.sys by Creative
Auzentech Prelude is a sound card the accompanying software of which includes a 32 bit .sys file from Creative Technology that seriously debilitates a Window 64 bit system's ability to run Sibelius 7!
C:\Windows\system32\drivers\ctaud2k.sys
product: Creative Audio Product
company: Creative Technology Ltd
description: Creative WDM Audio Device Driver
Never install (or uninstall) the Creative software in the driver-package from Auzentech. Only use the Auzentech driver and software if you plan on buying the Sibelius software!
I learned this the hard way!
I hope I save someone else by this warning.:)