It's not a virus, and no it's not "somewhere in your laptop."
It's just another computer somewhere on your network.
Judging by the generic machine name and sharing icon, it's a Windows computer that's on the same network as you.
As Darth.Titan said, it's not on your computer. It's a nearby computer that's on your network. Also, there are no viruses in the wild that can infect your Mac. Other forms of macOS malware exist that can all be avoided, but no viruses.