Hi,
This drive could be a recovery partition drive for the operating system on the computer.
To verify the issue better, let’s check if there are any unassigned drive under Disk Management. Follow the steps:
a) Press
Windows and R key together and type “diskmagmt.msc”. Hit
Enter.
b) Check if there are drive partition with unassigned drive letter.
Again, if there are any external devices/drives connected to the computer, disconnect them and check if it shows up.
To get a better picture of the issue, I would suggest you to post a screenshot of the window under Disk Defragmenter showing the drive. Follow the steps:
a) First of all, take a screen shot of the issue and save it to location on the computer.
b) Now, click on
Add image on the answer website.
c) Browse to the location and click on
Upload Image.
Please get back to us with the required information in order to troubleshoot the issue further.