Network connectivity issues

[tanos2k]

I upgraded my Dell XPS12 With Dell S2340T. Everything Works fine exept the network adapter. I get the following Device status:

This device is not working properly because Windows cannot load the drivers required for this device. (Code 31)

An I/O operation initiated by the Registry failed unrecoverably. The Registry could not read in, or write out, or flush, one of the files that contain the system's image of the Registry.

Im having a simliar issue with a Lenovo IdeaPad U400. I do not see a yellow exclamation mark next the driver. It just shows that it can't connect. This has been happenening with the last few driver updates. Ive had to roll back to version 6.3 M1 as this seems to be the only version that works properly. It's a bit fustrating as Im using office 2013, so outlook is crashing cause of the older video drivers...