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When I try to install the USB interface drivers I get an error copying driver file mtiunin.exe. What am I doing wrong?

In some cases, a mtiunin.exe error is due to the drivers already being installed on the PC, with the files marked as read-only. Check to see if the files have already been installed in the location you have selected, or if you do not have read/write access to the installation directory. If you are having trouble getting the USB drivers to work properly, try deleting the installed files and reinstalling them, or follow the procedure in the next question.