A smart card reader is a computer peripheral designed to read small, portable flash memory cards called smart cards. Testing a smart card reader for errors on your computer involves using a program called the "Device Manager." The Device Manager will allow you to scan your computer's hardware for changes, which will tell you if the reader is operating properly or if any errors have been detected.
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Click "Control Panel."
Click "Device Manager."
Right-click the icon for your smart card reader. Click "Scan for Hardware Changes."
Right-click the icon for your smart card reader. Click "Properties." Any errors that were found during the test of the card reader will be explained in detail in the window on screen.