This issue is caused when Microsoft Windows does not properly detect the chipset or videodisplay.
Go to Control panel, enter System to access your Device Manager Scroll down to the LPT/ COM port then double click Prolific USB to Serial Comm Port Click Driver in the Windows Properties section The driver must be numbered as '188.8.131.52' and dates accordingly. USB™ multi-port adapters with Ethernet connectivity and some Ethernet adapters are not compatible at this time (due to IC design). Click here for more information. The display driver does not support Mac® computers with the M1 processor at this time, contact your computer manufacturer to verify if your computer supports the display driver. . How to install the device driver under Windows environment. To operate TEAC CD-ROM,the device driver (TEACCDI.SYS) has to be installed from INSTALLATION DISK came along with CD-ROM. Please follow the instruction below. Start up the Windows. Insert INSTALLATION DISK in Floppy Disk Drive. Open 'File' menu and select 'Run'. If your device does not appear in this list, reseat the cable connected to your computer or try a different port. If your audio device shows up as an Unknown device or has a yellow caution symbol, you will need to uninstall the device and then reinstall the latest driver (see Driver Reinstall below).
Corrupt or missing motherboard or chipset drivers
Download and install the latest chipset and video card drivers. If you or someone you know built your computer, it came with the motherboard CD. This CD contains the chipset drivers. Otherwise, you can find drivers for all the major chipsets on our motherboard drivers page.
Corrupt or missing video card drivers
If installing the latest chipset or motherboard drivers doesn't resolve your issue, make sure you have the latest drivers installed for your video card. For a listing of video card drivers, see our video card drivers page.
Other PCI device that Windows cannot identify
If you tried the above two steps and your Windows Device Manager still contains an Unknown PCI device, likely the device cannot be identified.
If you that the device not being identified is installed, we suggest you obtain the latest drivers for that device. A listing of drivers is on our drivers page.
If you have recently finished installing or reinstalling Windows onto the computer and are getting the unknown PCI device, we suggest you manually identify the PCI device through the registry.
Cdi Port Devices Drivers
CDI Port Devices Driver
- See the PCI and drivers definition for further information and related links.