I had this happen with my home p.c. Hubby looked at Windows Explorer, My Computer, and found that it no longer saw the drive (D: in my case). Somehow, the driver(s) disappeared. Hubby downloaded the necessary driver(s), and then everything worked again. Since he did it, I can’t give you any further details, but that might get you started & maybe someone else can give you more info. HTH!
Does it still appear in My Computer? If not, try this;
Hit start and type regedit in the seach bar. Select local machine then system, then current control set, then control, then class, then select the set that starts 4D36E965. Once in there delete the upper and lower filters. Restart your machine and it should work fine :-)