SD card not showing/registering

Hi, I have had this problem for a while now, and somethimes it works, sometimes not... Really wierd. As of now it is getting worse with it not working most of the times :'(

When I plug in an SD card (I have multiple card, none working) the card does not show up on "my PC" at all.... Sometimes I can see the SD card on the little tab in the bottom right corner which you use if you want to disconnect the card "safely", I try to click on that, but noooothing happens then either... Then if I...

SD card not showing/registering