Found a solution.
Lost the url

but here is the text I copied and used to fix WMI.
At the command line, type net stop winmgmt. You may get a warning that other services need to be stopped as well; type Y and continue.
2. Open Explorer and go to the folder called %SystemRoot%\System32\WBEM\Repository.
3. Delete that folder and everything in it.
4. Reboot the system normally.
5. On the next login, open a command prompt and type the following commands in this order:
winmgmt /clearadap
winmgmt /kill
winmgmt /unregserver
winmgmt /regserver
winmgmt /resyncperf
After a second restart the connections are accessible as before without any errors and my xbox360 sees outside too.