My Windows 10 machine was automagically updated today. Looks like the "Windows 10 Anniversary update" When I restarted Virtualbox my server with a bridged adapter showed same as OP. I tried rerunning the VirtualBox installer (it did a Repair) - that did not fix the issue. I tried running the installer again as Admin (it did a Repair) - that did not fix. I ran the installer and selected UnInstall, then ran it again to Install. And the Network adapter settings looked good. Server started and connected to my network as usual. Whew.
Hope this helps someone.
My Windows 10 machine was automagically updated today. Looks like the "Windows 10 Anniversary update" When I restarted Virtualbox my server with a bridged adapter showed same as OP. I tried rerunning the VirtualBox installer (it did a Repair) - that did not fix the issue. I tried running the installer again as Admin (it did a Repair) - that did not fix. I ran the installer and selected UnInstall, then ran it again to Install. And the Network adapter settings looked good. Server started and connected to my network as usual. Whew. Hope this helps someone.
WINDOWS FIX: Ive' Fixed it by downloading a new VMbox installer from the Official Website Here.
Dont worry about your VM's they will not disappear if you override your current installation.
NOTE: If you already have the latest version, you need to export all your VM's, unninstall your current VMBox and install it from new installer.
I faced the same problem today after updating the Virtual Box. Got resolved by uninstalling Virtual Box and moving back to old version V5.2.8