Well, great companies don't want to put all the drivers to their site, thinking that everyone has the latest hardware. Once I repaired an older notebook, and reinstalled windows xp. It had some kinda mobile video card, and I didn't find any driver for windows xp at all! I had to install vista, and let the download center to install the driver automatically.
Anyway, let's hope your server will be more lucky from now on and won't get caught by a lightning.
A good, easy and cheap way to protect your computer from overvoltage is to apply a neon bulb in parallel to your mains. This will regulate any voltage that is above 115/230V. If a thunder strikes, this bulb will explode, shorting your mains cables and the circuit breaker will open. This won't protect your computer from high frequency noises, but power supplies have this kind of filters.