Computer / Software

I've just bought a PC laptop and a MOTU 828. I installed the software and have been using Emagic Logic 5.5. However when I turn off the computer's Advanced Configuration Power Interface (ACPI) it no longer recognises that the 828 is there. Why?

I've heard that with Windows XP, old versions of Norton Speed Disk do not work and that the latest version of Speed Disk included in Norton Utilities has a number of features removed and is no better, if not worse, than the defrag utility that Windows XP comes with...