Windows server 2008 R2 error connecting to server

Hi there,
Windows Server 2008 R2 showed up this morning this error that I have no idea what is causing it or what it really means. I don’t have problems with my Internet connection and I didn’t make any changes in the system last night. Can anyone help me please to fix this error ? What is causing this ?
Thank you !

Fehler
Die Veribindung zum Server konnte nicht hergestellt warden auf Port 7000.
Bitte Oberprofen Sie Ihre Netzwerkeinstallungen.
