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How to Remove a Faulty Driver

Connect your system to your computer (it does not need to be switched on).
Go to Device Manager
Windows 10 & 8 – right click Start then select Device Manager

Windows 7 – Click Start type Device Manager in the search box

Double click USB Serial Bus controllers (1)
Double click USB Serial Converter (2)
Go to the Driver tab (3)
Click Uninstall (4)
Tick 
the check box (5)
Click OK (6)
Click OK (7)
(It is only necessary to uninstall the driver from the USB Serial Converter – the other instance is uninstalled simultaneously)

NOTE: You may be prompted to restart your computer.