Cannot see basic network information anymore


When I click "open Network and Sharing Center", it says "The service to detect this status is disabled" and ask me if I want to Turn On the Network List Service. But this service is already started (automatic). Even if I press the "Turn this on" button, it does nothing else. Log On account for the service is "Local System". Firewalls are disabled. And it always worked before...


How can I fix this?

thanks for your time and help

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