Cd rom not detected what can i do to resolve this

External CD drives are usually have a USB interface, therefore, either the usb drivers have not been loaded for this particular device or the chipdet drivers are old and need to be updated. Chipset drivers can be downloaded at the Acer support site, put in your laptop model and then choose the operating system, your downloads will appear. USB drivers for the external CD drive can be obtained from either the manufacturers website or if there is a mini cd rom of the drivers, you would need to put those drivers on a flash drive from another computer and load the drivers through the flash drive.