M-AUDIO AP-012403 - Manual (Page 29)

7. A Digital Signature Not Found window will appear.As this is a relatively
new product, it has does not have an official Windows Digital Signature
yet. Rest assured, our USB drivers are of the highest quality and will not
cause problems in your system. Click “Yes.”
8. An M-Audio Setup window will appear next. Make sure both Enable
Digital CD and Enable DMA Transfer Mode boxes are checked, then
click “Next.”
9. An M-Audio Setup window will come up confirming a successful setup.
Click “Next,” to successfully install the USB Audiophile.
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