Lindy USB 2.0 4+1 Port PCI Card 51084 - Manual (Page 6)

2. The driver will be extracted on to your desktop. It is stored in
disk image format; the image will be mounted automatically
3. Double click on the driver file icon. You will be prompted to
enter your password. If your account does not have
administrative access, you must enter the user name and
password that does.