|If you have a memory card reader, there is often one or more drive letters for it, even when there is no memory card in a slot.|
E.g. I have one
- it produces 4 drive letters - one for each group of card types it can read (it has only two slots).
- it says Removable Disk beside the drive letter in My Computer when there is no memory card in a slot,
- or - the volume label text of the memory card is beside the drive letter when a memory is inserted in a slot, if the card has a volume label - e.g. a CF (Compact Flash) card from an older digital camera shows CANON_DC .
In Device Manager - Disk drives
it shows, for the card reader...
Generic USB storage-CFC USB Device
Generic USB storage-MMC USB Device
Generic USB storage-MSC USB Device
Generic USB storage-SMC USB Device
Double clicking on any of them, choosing Volumes - clicking on Populate shows whether or not there is a memory card inserted being detected regardless of whether it has a volume label.
If you never use the card reader, if you can't unplug it, you could double click on each one and choose
Do not use this device (disable), click on OK.