For those just now finding their way to this thread - we have a second solution we’d like to offer.
Please use this method if you haven’t already tried the one upstream.
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Download the file called BleWin10Lib.dll from Zwift’s box.com account.
(As @Dave_ZPCMR noted below - your browser may give you warnings about an unsafe download. This is a file coming from ZwiftHQ, so it can be trusted.) -
Save that (and overwrite the existing file of the same name) in
C:\Program Files (x86)\Zwift
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Reboot your computer
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Start Zwift and verify if you can see the trainer’s BLE signal.
Please let us know if this second solution worked for you. This is an either/or situation. Please do not try the second method if you’re already done the first.