Last days there were some Windows updates installed and a reboot was needed. After this reboot I had multiple BSOD screens and no quick solution to fix it. Looking for the error message in Event Viewer
it seems that Hyper-V was failing on the driver. A quick workaround for this is to plugin a network cable and deactivate Wi-Fi.
Update: I don't know if it matters, but configure the Hyper-V connection type on your fixed NIC adapter, not on your Wi-Fi adapter. For it seems some people still have issues otherwise.
Update 23-7-2013: For it seems the issue is still valid. I'm using Internet Connection Sharing (ICS) for a while now, so no need to configure a bridge. With ICS you can share internet from a fixed or Wi-Fi connection to the vEthernet connection. Much better that way, and no BSOD issues on the bridge.sys driver.