The UA-1D uses a generic Microsoft USB Audio driver which is provided by Windows. Please note that this driver does not support ASIO, which is an advanced driver not designed by Microsoft.
If the driver installation program prompts you for files, they will be located on your Windows CD-ROM. If you do not have a copy of Windows, or if you have a system recovery CD instead of Windows, you will need to contact your computer manufacturer for any files needed by the driver installer program.
NOTE: The content on the included CD-ROM cannot be downloaded.