SD card reader

I am unable to have my system reading the SD card. Nor does that little window of Microsoft come up where I had choices for what I wanted to do. Expl: dowlnload CD Picture or so on. Nothing is coming up no longer. How do I restore that drive or File as it may be called.
Please when you explain don’t be to technical in lingo I am a plain jane compueter dummy.

But I think you be able to help out.