This is a very small issue which may occur to Windows VPS users. Just follow the simple steps below to fix this issue.
Press OK and Login to Windows.
Once Desktop is opened, Right click on >My Computer and click on Properties. Then click on the Computer Name tab and you'll see something like this:
Yours will of course have different computer descriptions, names and Workgroup names.
To change the name, on that Computer Name dialog, just hit the Change button, and you'll see a dialog such as this:
As you can see, you can change your computer name to whatever you like, or change the Workgroup it's a part of. (You probably want all the computers on your network to be a part of the same Workgroup to enable file sharing more easily.) Once you change the computer name, OK your way back out. Reboot and you will see that the error message you were seeing is now disappeared.