This article applies to the following products:
When specific Windows 7 hotfixes have been installed, the Ledger Wallet might be setup with an incorrect driver.
You'll see this if the device is not detected by Chrome and listed as a "WinUsb Device" in the Control Panel.
To fix this, update the driver to be a generic "USB input device" instead. You must go in your Device Manager (windows panel), and then select the Nano in the USB devices: Right click > Properties > Update driver > Microsoft > HID > Next... Once it's done, remove the Ledger Nano, insert it again, kill all Chrome processes and restart Chrome.