Why is my MacBook Pro's hard drive name changed to 'poikjuhygtvfrcdxsezawq'?

When I opened "Finder" on my MacBook Pro this morning there was an item under "locations" that I had never seen before - it shows this: ]=[poikjuhygtvfrcdxsezawq. Why would the name of my hard drive be changed if I didn't make this change?? I also see it on my desktop (pic below)

[Re-Titled by Moderator]