Airsand

I've tried to install an updated driver from the Windows update website and it always seems to download OK, but when it goes into the install phase a window pop's up that say's "can windows uninstall the current driver, Yes or No". If I select no the install won't complete. If I select yes my net connection immediatly terminates and I can't reconnect to the net after that. I end up having to reload all my software and start all over again. I must need the updated driver because my connection speeds with the older driver are always lower than they should be, and why else would Windows Update tell me to install the new one if it wasn't nessacary. Is it possible to download the driver and save it to disk and then try to install it offline? I'd really appreciate if anyone can assist. Puzzled