The wireless interface and drivers on the clients are a very important part of a successful wireless connection. Using well testet adaptor and driver version is highly recommended to keep the wireless-only office running to everyons joy.
Instead of upgrading the wireless driver using the Intel tool that does it automaticly it can be handy to just download the raw driver. But the download link can be hard to find. At time of writing you can find it here:
Be ware that the intel proset driver version download contains drivers for many interfaces. The included driver version for each model is not the same as the proset version. Which version is included can be found here: