You should see if other USB devices are working on the same ports and visually inspect them for damage. Inspect the cable end on the external drive too. It's also possible that maybe the bios battery is low and things got scrambled or turned off. Some laptops do have security setting features in the bios to turn on/off usb ports.
The drive is not detected on the OP's home computer or the XP computer at his office. That is what is strange.
From OP's post #24 after I recommend a cable swap. I have never heard or seen one of these. I'm thinking he's looking at a micro USB connector.
I can't try a different cable: the external drive has a "custom-crimped" connector, and nothing else will fit into it.
Edited by JohnC_21, 15 November 2017 - 05:39 PM.