Red X instead of the drive icon

In the Folder Tree under This PC one of my drives has a red X instead of a drive icon. It's an internal Seagate hard drive. Example: X P2 ST1000b (F:)

Does that drive have the same icon in File Explorer?

Yes, it shows up in File Explorer also. Since you brought this to my attention this probably is not a DOpus problem. However, any suggestions as to what might be causing it would be appreciated.

The drive might have that set as its icon, or some software may be overriding the icon to indicate some kind of state.

Thank you Leo. I'll check further.