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Thank you VERY much, Roger, for your detailed explanations. I'm going to choose to heed your warning. > On Thu, 8 Sep 2016, Jeff Bowman wrote: > > > 1. CLI error: I get an error when running ?upsdrvctl start?: ?Can't > > claim USB device [051d:0003]: libusb0-dll:err [claim_interface] could not > claim interface 0, win error: The requested resource is in use.? The

...t;"? FYI RDP is the Windows equivalent to SSH, then a PowerShell prompt. I just did so and ran this again: upsc ups at localhost Only a blank line echoes to the screen, presumable because the other *usb* processes aren't running. Note that when I run upsdrvctl start as indicated on pp21 of the NUT User Manual (PDF), I get the conflict error I described earlier: Can't claim USB device [051d:0003]: libusb0-dll:err [claim_interface] could not claim interface 0, win error: The requested resource is in use. Driver failed to start (exit status=1) Running the .MSI setu...