Windows cannot detect my new CardBus or ExpressCard expansion card. What do I do?

To determine if Windows detects your expansion card, you need to check Device Manager to see if the card is listed under the appropriate heading or listed with an error. An example of an appropriate heading for a USB controller card is Universal Serial Bus controllers. The expansion card is listed in Device Manager as the name of the chipset. You can find the name of the chipset on the Technical Specifications tab for the product ID on https://www.startech.com/.

To open Device Manager, press the Windows key + R, type devmgmt.msc, and press Enter.

If you install a new CardBus or ExpressCard expansion card and Windows cannot detect the card, there are some quick tests that you can complete to identify the issue. 

• Turn off the computer, unplug the power cord, and remove the expansion card. Put the card back into the computer, making sure to apply firm pressure across the entire card. Press the expansion card as far into the slot as it can go. The expansion card should click into place. 
• Put a different expansion card in the slot that is experiencing the issue with the new expansion card.
• Put the new expansion card in another computer.
• If you completed the previous steps and determined that the problem is not with the card or expansion slots on the laptop, update the motherboard's BIOS.