Did you try a liveUSB of Ubuntu or similar to see if it was a Wndows issue?
DAC requires a Windows driver so that may not work.
@ChasnotRobert started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
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Did you try a liveUSB of Ubuntu or similar to see if it was a Wndows issue?