Laptop Freezes on Startup on Connecting to Internet

Hi,

I've a Dell XPS L501X laptop running windows 7 with a 64-bit processor. My laptop freezes every time on startup and the only way to stop it from freezing is to go into windows mobility centre right as you get to the desktop and turn wireless off. If wireless connectivity is already turned off it starts up fine.

However, when I turn wireless back on it won't connect. To resolve this I've to troubleshoot the connection problem by clicking the red X between the "gateway" and "internet" icons.

I checked the drivers in device manager and for Microsoft virtual wifi miniport adapter #2 it says "This device is not working properly because Windows cannot load the drivers required for this device. (Code 31)", but when I go to update the driver I get the message "windows can't verify the publisher of this driver software".

I've tried reinstalling the driver with no success, can anyone help?