Now, reconnect it to check if the trick worked. But if you are using an external card reader, make sure that you have disconnected it before turning off the computer. Lose connection between SD card and SD card readerīefore you get on with all the methods to solve the issue, you must restart your computer to see if the problem solves or not.Here are some of the typical factors responsible for the case. As stated earlier, although various factors give rise to the situation, you can always find the solutions if you know the root cause. SD card reader not getting recognized on a computer is a common issue, whether it's Windows 7, 8, or 10. People often correlate the Dell memory card reader not working to a particular version of the Windows operating system. Solutions to Fix SD Card Reader Not Working on Windows 10/8/7 Fix 6: Recover Data and Format SD card for Reusing.Fix 5: Force SD Card to Show Up from Virus or Malware.