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Bit of an experiment.
I have 2 x ASIC Miner Block Erupter 333Mh/s Rev. 3.00 plugged into powered USB ports.
I've downloaded and installed CP210x_Universal_Windows_Driver from https://www.silabs.com/products/development-tools/software/usb-to-uart-bridge-vcp-drivers.
I see:
If I run bfgminer, I receive an error "no devices found. Press 'M' and '+' to add". I press M, then +, but no devices are detected.
Help appreciated.

Do you know if BFGminer monitors the temperature of the devices? – Steve – 2017-12-23T12:16:14.210
I've added a question here.
– Steve – 2017-12-23T12:27:53.933